Danh sách câu hỏi

Có 30,138 câu hỏi trên 603 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 30 to 34        There has been a trend over recent decades for families to become less close than they were in the past and this situation is largely accepted in society. This essay will discuss the reasons for this and examine the benefits and drawbacks of this development.        One of the first reasons for a decline in the closeness of families is connected to the busy lifestyles that we now lead. Most people are having to work longer hours and often both parents work, so they simply do not have as much time to spend with each other as they did in the past. Another factor is the materialistic and consumer driven culture we now live in, which has led to less value being placed on family relationships. Modern technology also means that people are more interested in their online life than interacting with their family in their free time.        It could be argued that this has benefits. If people are not so close with their family, they are free to pursue their own dreams and aspirations, and to focus on improving their own lifestyle. However, I believe that there are far more negative outcomes. The most important factors leading to a fulfilled and happy life are emotional security and comfort. Without these we are in danger of feeling lost. It is a difficult world we live in and we need the support of people close to us to cope with modern life. We are seeing a rise in mental health problems in many countries and this may well be a factor in this.        To conclude, busy modern lifestyles, changing cultural values and modern technology are causing families to become less close. We should try to halt this trend as it has more negative than positive outcomes.   What is the passage mainly about?
Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 35 to 42        Pollution is a threat to many species on earth, but sometimes it can cause species to thrive. Such is the case with Pfiesteria piscicida. A one-celled creature called a dinoflagellate, Pfiesteria inhabits warm coastal areas and river mouths, especially along the eastern United States. Although scientists have found evidence of Priesteria in 3,000-year-old sea floor sediments and dinoflagellates are thought to be one of the oldest life forms on earth, few people took notice of Pfiesteria.        Lately, however, blooms - or huge, dense populations - of Pfiesteria are appearing in coastal waters, and in such large concentrations the dinoflagellates become ruthless killers. The blooms emit powerful toxins that weaken and entrap fish that swim into the area. The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh. Often the damage is astounding. During a 1991 fish kill that was blamed on Pfiesteria on North Carolina's Neusc River, ncarly one billion fish died and bulldozers had to be brought in to clear the remains from the river. Of course, such events can have a devastating effect on commercially important fish, but that is just one way that Pfiesteria causes problems. The toxins it emits affect human skin in much the same way as they affect fish skin. Additionally, fisherman and others who have spent time near Pfiesteria blooms report that the toxins seem to get into the air, where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment.        For a while, it seemed that deadly Pfiesteria blooms were a threat only to North Carolina waters, but the problem seems to be spreading. More and more, conditions along the east coast seem to be favorable for Pfiesteria. Researchers suspect that pollutants such as animal waste from livestock operations, fertilizers washed from farmlands and waste water from mining operations have probably all combined to promote the growth of Pfiesteria in coastal waters.   (Source: Michigan Proficiency)   What is true of Pfiesteria?