单选题57. Susan is always a shy girl and feels ______ in the presence of strangers.

单选题32. My teacher recommended that I ______ as careful as possible when I took an exam.

单选题. Question 15 to 17are based on the conversation you have just heard.1.

单选题 People can be addicted to different things—e, g.

单选题16. One can't see well through a telescope without correctly ______ it to one's sight.

单选题. Half of the world's coral reefs (珊瑚礁) have died in the last 30 years. Now scientists are racing to ensure that the rest survive. Even if global warming were to stop right now, scientists predict that more than 90% of corals would die by 2050. If no major steps are taken to address the problem, the reefs may be headed for total extinction. The planet's health depends on the survival of coral reefs. They are often described as "the rainforests of the sea", because they provide shelter for a wide variety of sea life. In addition, the reefs serve as barriers that protect coastlines from the lull force of powerful storms. Corals are used in medical research on cures for diseases. They are key to local economies as well, since the reefs attract tourists, the fishing industry, and other businesses, bringing in billions of dollars. Corals are particularly sensitive to changes in temperature. A rise of just 1 to 2 degrees can force the corals to drive out the algae (水藻). Then the corals turn white in a process called "bleaching". Corals can recover from short-term bleaching, but long-term bleaching can cause permanent damage. In 1998, when sea surface temperatures were the highest in recorded history, coral reefs around the world suffered the most severe bleaching. It is estimated that even under the best of conditions, many of these coral reefs will need decades to recover. Although reefs face other threats from pollution, industrial activities, and overfishing, it is global climate change that most concerns scientists. Scientists remain hopeful that it's not too late to save the reefs, and some are moving ahead on experiments to accomplish that goal.1. According to the passage, ______ is the biggest threat to coral reefs.

单选题25. Passengers should allow for ______ travel time to the airport in rush hour traffic.

单选题34. He is the only one of the students who ______ a winner of scholarship for three years.

单选题15. I ______ in university when I am 20 years old.

单选题39. It was Mike ______ opened the door for me.

单选题5. I asked him to ______ me a few minutes so that I could have a word with him.

单选题5. My problems are very similar ______ yours.

单选题23. She needs more friends of her own ______.

单选题 These results must be accurate

单选题People have wondered for a long time how their personalities and behaviors are formed. It is not easy to explain why one person is intelligent and another is not, or why one is cooperative and another is competitive. Social scientists are, of course, extremely interested in these types of questions. They want to explain why we possess certain characteristics and exhibit certain behaviors. There are no clear answers yet, hut two distinct schools of thought on the matter have developed. As one might expect, the two approaches are very different from one another, and there is a great deal of debate between proponents of each theory. The controversy is often referred to as nature/nurture. Those who support the nature side of the conflict believe that our personalities and behavior patterns are largely determined by biological and genetic factors. That our environment has little, if anything, to do with our abilities, characteristics, and behavior is central to this theory. Taken to an extreme, this theory maintains that our behavior is predetermined to such a degree that we are almost completely governed by our instincts. Proponents of the nurture theory, or as they are often called, behaviorists, claimed that our environment is more important than our biologically based instincts in determining how we will act. A behaviorist, B. F. Skinner, sees humans as beings whose behavior is almost completely shaped by their surroundings. The behaviorists view of the human being is quite mechanistic; they maintain that, like machines, humans respond to environmental stimuli as the basis of their behavior. Neither of these theories can yet fully explain human behavior. In fact, it is quite likely that the key to our behavior lies somewhere between these two extremes. That the controversy will continue for a long time is certain. 1. Which of the following statements would supporters of the "nature" theory agree with? ______

单选题23. There is not much news in today's paper, ______?

单选题24. This university is outstanding ______ its faculty and reference resources.

单选题9. The tribe had been living in that part of the area for generations until the civil war ______.

单选题 Jenny was looking for a seat when, luckily

单选题36. The number of employees at the factory ______ to a minimum so as to lower production costs.