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Read the following passage carefully and then choose the best answer to  each question. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.          Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M.           In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered.In line 2, the word "potential" could best be re-placed by which of the following?
Read the following passage carefully and then choose the best answer to  each question. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.          Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M.           In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered.What does the passage mainly discuss?
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 43
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 44
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 42
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 41
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 40
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 39
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 38
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 37
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 36
Choose the word or phrase - A, B, C or D - that best completes the passage. The most dominant and reliable features of facial expressions provide a constant channel of communication. They can be shifty and evasive; convey hate, fear, and guilt; or (35) _____ confidence, love, and support.Referred to as "mirrors of the soul" our eyes serve as the major decisive factor in (36) _____ the spoken words. The eyes of the man converse as (37) _____ as their tongues, with the advantage that the ocular dialect needs (38) _____ dictionary, but it is understood all over the world. When the eyes say one thing, and the tongue another, a practiced man relies on eyes. Except (39) _____ extremely shy individuals, most people look for social acceptance by studying the eyes of others. Eyes also can (40) _____ indicate a positive or a negative relationship. People tend to look longer and more often at the people whom they trust, respect and care about than at those whom they doubt or (41) _____. Normal eye dilation is not under control of the individual. Personally characteristics such as introversion and extroversion also influence eye behavior. Eye behavior seems (42) ____ particular importance and is generally used to indicate whether one is open to communication. This can be observed when a teacher asks the class a question: students who think they know the answer will generally (43) ____ at the teacher, (44) ____ students who do not know the answer will usually try to avoid eye contactĐiền vào ô 35
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.When the first white men came to America, they found vast amounts of natural resources of tremendous value. Forests covered a large part of the nation; later gas, oil and minerals were found in unbelievable amounts. There was a great abundance of very fertile soil. Forests, prairies, streams and rivers abounded with wildlife. So vast were these resources that it seemed that they could never be used up. So forests were destroyed to make way for farmland. Grasslands and prairies were ploughed and harrowed. Minerals and oil were used in great quantities to supply a young industrial nation. Almost every river became the scene of factories, mills and power companies. Mammals and birds were slaughtered for food and sport.Within a short time, the results were obvious. Floods caused millions of dollars worth of damage yearly. The very fertile soil was washed away or blown up in great clouds. The seemingly inexhaustible oil and minerals showed signs of depletion. Rivers were filled with silt from eroding farms and wastes from factories. Many of the rivers were made unfit for fish. Several species of birds disappeared, and some mammals seemed on the verge of going. Future timber shortages were predicted. In short, Americans soon became to realize that some sort of conservation program must be set up, if future as well as present Americans were to share in the resources that are the heritage of every American.The word "abounded with" could best replaced by___________.
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.When the first white men came to America, they found vast amounts of natural resources of tremendous value. Forests covered a large part of the nation; later gas, oil and minerals were found in unbelievable amounts. There was a great abundance of very fertile soil. Forests, prairies, streams and rivers abounded with wildlife. So vast were these resources that it seemed that they could never be used up. So forests were destroyed to make way for farmland. Grasslands and prairies were ploughed and harrowed. Minerals and oil were used in great quantities to supply a young industrial nation. Almost every river became the scene of factories, mills and power companies. Mammals and birds were slaughtered for food and sport.Within a short time, the results were obvious. Floods caused millions of dollars worth of damage yearly. The very fertile soil was washed away or blown up in great clouds. The seemingly inexhaustible oil and minerals showed signs of depletion. Rivers were filled with silt from eroding farms and wastes from factories. Many of the rivers were made unfit for fish. Several species of birds disappeared, and some mammals seemed on the verge of going. Future timber shortages were predicted. In short, Americans soon became to realize that some sort of conservation program must be set up, if future as well as present Americans were to share in the resources that are the heritage of every American.Much of the fertile soil of America ha__________ .
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.When the first white men came to America, they found vast amounts of natural resources of tremendous value. Forests covered a large part of the nation; later gas, oil and minerals were found in unbelievable amounts. There was a great abundance of very fertile soil. Forests, prairies, streams and rivers abounded with wildlife. So vast were these resources that it seemed that they could never be used up. So forests were destroyed to make way for farmland. Grasslands and prairies were ploughed and harrowed. Minerals and oil were used in great quantities to supply a young industrial nation. Almost every river became the scene of factories, mills and power companies. Mammals and birds were slaughtered for food and sport.Within a short time, the results were obvious. Floods caused millions of dollars worth of damage yearly. The very fertile soil was washed away or blown up in great clouds. The seemingly inexhaustible oil and minerals showed signs of depletion. Rivers were filled with silt from eroding farms and wastes from factories. Many of the rivers were made unfit for fish. Several species of birds disappeared, and some mammals seemed on the verge of going. Future timber shortages were predicted. In short, Americans soon became to realize that some sort of conservation program must be set up, if future as well as present Americans were to share in the resources that are the heritage of every American.It seemed to the early American settlers that _________.
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.When the first white men came to America, they found vast amounts of natural resources of tremendous value. Forests covered a large part of the nation; later gas, oil and minerals were found in unbelievable amounts. There was a great abundance of very fertile soil. Forests, prairies, streams and rivers abounded with wildlife. So vast were these resources that it seemed that they could never be used up. So forests were destroyed to make way for farmland. Grasslands and prairies were ploughed and harrowed. Minerals and oil were used in great quantities to supply a young industrial nation. Almost every river became the scene of factories, mills and power companies. Mammals and birds were slaughtered for food and sport.Within a short time, the results were obvious. Floods caused millions of dollars worth of damage yearly. The very fertile soil was washed away or blown up in great clouds. The seemingly inexhaustible oil and minerals showed signs of depletion. Rivers were filled with silt from eroding farms and wastes from factories. Many of the rivers were made unfit for fish. Several species of birds disappeared, and some mammals seemed on the verge of going. Future timber shortages were predicted. In short, Americans soon became to realize that some sort of conservation program must be set up, if future as well as present Americans were to share in the resources that are the heritage of every American.The use of America's natural resources by the early settlers was___________. 
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.When the first white men came to America, they found vast amounts of natural resources of tremendous value. Forests covered a large part of the nation; later gas, oil and minerals were found in unbelievable amounts. There was a great abundance of very fertile soil. Forests, prairies, streams and rivers abounded with wildlife. So vast were these resources that it seemed that they could never be used up. So forests were destroyed to make way for farmland. Grasslands and prairies were ploughed and harrowed. Minerals and oil were used in great quantities to supply a young industrial nation. Almost every river became the scene of factories, mills and power companies. Mammals and birds were slaughtered for food and sport.Within a short time, the results were obvious. Floods caused millions of dollars worth of damage yearly. The very fertile soil was washed away or blown up in great clouds. The seemingly inexhaustible oil and minerals showed signs of depletion. Rivers were filled with silt from eroding farms and wastes from factories. Many of the rivers were made unfit for fish. Several species of birds disappeared, and some mammals seemed on the verge of going. Future timber shortages were predicted. In short, Americans soon became to realize that some sort of conservation program must be set up, if future as well as present Americans were to share in the resources that are the heritage of every American.The word "silt" in paragraph 2 is closest in meaning to_____________
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.When the first white men came to America, they found vast amounts of natural resources of tremendous value. Forests covered a large part of the nation; later gas, oil and minerals were found in unbelievable amounts. There was a great abundance of very fertile soil. Forests, prairies, streams and rivers abounded with wildlife. So vast were these resources that it seemed that they could never be used up. So forests were destroyed to make way for farmland. Grasslands and prairies were ploughed and harrowed. Minerals and oil were used in great quantities to supply a young industrial nation. Almost every river became the scene of factories, mills and power companies. Mammals and birds were slaughtered for food and sport.Within a short time, the results were obvious. Floods caused millions of dollars worth of damage yearly. The very fertile soil was washed away or blown up in great clouds. The seemingly inexhaustible oil and minerals showed signs of depletion. Rivers were filled with silt from eroding farms and wastes from factories. Many of the rivers were made unfit for fish. Several species of birds disappeared, and some mammals seemed on the verge of going. Future timber shortages were predicted. In short, Americans soon became to realize that some sort of conservation program must be set up, if future as well as present Americans were to share in the resources that are the heritage of every American.Some species of birds and mammals seemed___________.