Danh sách câu hỏi ( Có 86,238 câu hỏi trên 1,725 trang )

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 from 43 to 50.    Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds - any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants.     The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them.     In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world's weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.     The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season.With what topic does this passage primarily deal?

Xem chi tiết 555 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.The Internet has truly transformed how students do their homework. (31)______ homework today still means spending time in the library, it’s for a different reason. Rather than using books for research, students today are (32)______ to the Internet to download enormous amounts of data available online.In the past, students were limited to their school’s (33)______ of books. In many cases, they got to the school library and found out that someone had already taken the books they needed. Nowadays, such inconvenience can be avoided since the Internet never runs out of information. Students, however, do have to(34)______ sure that the information they find online is true. Teachers have also benefited from the homework which is done on the Internet. They do not need to carry students’ papers around with them any more. This is because online (35)______ allow students to electronically upload their homework for their teachers to read and mark. Of course, this also means that students can no longer use the excuse that the dog ate their homework!(Adapted from “Gold Pre-first Exam Maximizer,” by H. Chilton & L. Edwards, 2013, Harlow: Pearson)Điền ô số 35

Xem chi tiết 261 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.The Internet has truly transformed how students do their homework. (31)______ homework today still means spending time in the library, it’s for a different reason. Rather than using books for research, students today are (32)______ to the Internet to download enormous amounts of data available online.In the past, students were limited to their school’s (33)______ of books. In many cases, they got to the school library and found out that someone had already taken the books they needed. Nowadays, such inconvenience can be avoided since the Internet never runs out of information. Students, however, do have to(34)______ sure that the information they find online is true. Teachers have also benefited from the homework which is done on the Internet. They do not need to carry students’ papers around with them any more. This is because online (35)______ allow students to electronically upload their homework for their teachers to read and mark. Of course, this also means that students can no longer use the excuse that the dog ate their homework!(Adapted from “Gold Pre-first Exam Maximizer,” by H. Chilton & L. Edwards, 2013, Harlow: Pearson)Điền ô số 34

Xem chi tiết 293 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.The Internet has truly transformed how students do their homework. (31)______ homework today still means spending time in the library, it’s for a different reason. Rather than using books for research, students today are (32)______ to the Internet to download enormous amounts of data available online.In the past, students were limited to their school’s (33)______ of books. In many cases, they got to the school library and found out that someone had already taken the books they needed. Nowadays, such inconvenience can be avoided since the Internet never runs out of information. Students, however, do have to(34)______ sure that the information they find online is true. Teachers have also benefited from the homework which is done on the Internet. They do not need to carry students’ papers around with them any more. This is because online (35)______ allow students to electronically upload their homework for their teachers to read and mark. Of course, this also means that students can no longer use the excuse that the dog ate their homework!(Adapted from “Gold Pre-first Exam Maximizer,” by H. Chilton & L. Edwards, 2013, Harlow: Pearson)Điền ô số 33

Xem chi tiết 460 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.The Internet has truly transformed how students do their homework. (31)______ homework today still means spending time in the library, it’s for a different reason. Rather than using books for research, students today are (32)______ to the Internet to download enormous amounts of data available online.In the past, students were limited to their school’s (33)______ of books. In many cases, they got to the school library and found out that someone had already taken the books they needed. Nowadays, such inconvenience can be avoided since the Internet never runs out of information. Students, however, do have to(34)______ sure that the information they find online is true. Teachers have also benefited from the homework which is done on the Internet. They do not need to carry students’ papers around with them any more. This is because online (35)______ allow students to electronically upload their homework for their teachers to read and mark. Of course, this also means that students can no longer use the excuse that the dog ate their homework!(Adapted from “Gold Pre-first Exam Maximizer,” by H. Chilton & L. Edwards, 2013, Harlow: Pearson)Điền ô số 32

Xem chi tiết 349 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.The Internet has truly transformed how students do their homework. (31)______ homework today still means spending time in the library, it’s for a different reason. Rather than using books for research, students today are (32)______ to the Internet to download enormous amounts of data available online.In the past, students were limited to their school’s (33)______ of books. In many cases, they got to the school library and found out that someone had already taken the books they needed. Nowadays, such inconvenience can be avoided since the Internet never runs out of information. Students, however, do have to(34)______ sure that the information they find online is true. Teachers have also benefited from the homework which is done on the Internet. They do not need to carry students’ papers around with them any more. This is because online (35)______ allow students to electronically upload their homework for their teachers to read and mark. Of course, this also means that students can no longer use the excuse that the dog ate their homework!(Adapted from “Gold Pre-first Exam Maximizer,” by H. Chilton & L. Edwards, 2013, Harlow: Pearson)Điền ô số 31

Xem chi tiết 305 lượt xem 5 năm trước