I'm taking a test and have to guess the right answer to the question after the article. Article: There was once a forest made up of tiny trees that were all growing up together. They had been planted by a very old gardener who took care that they would all grow up to be straight and healthy. However, the area was hit by strong winds, and the little trees preferred to avoid the annoying winds, so they bent their trunks and branches to protect themselves. The old man, knowing they could never grow well like this, decided to straighten them out, and spent many hours tying their tiny trunks to supporting poles , hoping his beloved trees would understand he was doing this for their own good. But those naughty trees disliked all the wind. They always avoided the gardener's help by bending themselves, hiding from the wind. One of those trees, one standing right in the middle of the forest, forced itself to grow up straight, patiently bearing the annoying wind. Three years passed, and the old man died. And from then on the trees could grow however they liked, bending from the wind just as they pleased, with no one bothering them about it. All, that was, except the single straight tree in the center of the forest, who decided to grow up just as a tree should. But as the forest grew, and the trees got thicker and stronger, they began to hear cracks from inside. Their branches and trunks needed to keep growing, but the trees were so twisted that the growth they were experiencing only brought them pain and suffering. And it was a place with a special beauty since, right in its center, surrounded by thousands of short twisted trees, rose one impressive tree that was long and straight like no others. And that tree, the only one that never cracked, continued growing, without a worry for the changeable wind. Question: Why did the trees bend their trunks and branches? Options: A: Because the gardener often touched them. B: Because the wind were not strong. C: Because they protected themselves from being destroyed. D: Because they were very shy and afraid to meet the wind.
C

I'm taking a test and have to guess the right answer to the question after the article. Article: Sheng Huizhen's life story is typical of immigrants who have succeeded in America. After getting her PhD in biochemistry, she got a job as a researcher at the National Institutes of Health. She got a green card, bought a house in Maryland and worked her way up all the time. But then she moved back to China. A law in America stopped the use of public money for research on human embryos . This prevented her from doing the kind of work she wanted to do. The Chinese government attracts her to return with $75,000 for a new lab. She could use the lab to do her research. " Maybe because of the culture, the public in China are friendlier to the research," said Sheng, 55 , whose family remains in the United States. Attracted by support and a scientific environment more open to certain types of experiments, China's long-lost scientists are coming back. Besides, China announced that it would double its research-and-development spending by 2012, to about $69 billion. The returning scientists are very happy about that. In recent years, more than 275,000 have come back. Many of these "sea turtles" , as they are known, have returned with degrees in science or engineering. They are going to the Chinese Academy of Sciences, where 81 percent of the members are returning scientists. Fifty thousand of the returning scientists are starting their own companies, according to China's Ministry of Education, pushing the development in science. Question: What can be learned about returning scientists? Options: A: Most of them are working in Ministry of Education. B: They are satisfied with the scientific environment in China. C: Half of them came back to start companies. D: They are seriously short of money for research at home.
D

I'm taking a test and have to guess the right answer to the question after the article. Article: Roughly half of college students will have some degree of depression at some point during their time in school . Even more startling , 6.2 percent of college students surveyed in 2012 considered suicide and 1.3 percent attempted it , according to an American College Health Association study released this spring . If you're feeling depressed on campus , you may find the following tips helpful . Exercise : Physical activity releases endorphins - chemicals that produce an overall positive feeling within the body , which fight depression naturally . Mental health experts claim that exercise is a solution to those feeling mild or moderate depression . However , for those severely depressed , simply doing sports is not enough . Use school counseling services : Campuses don't employ mental health experts simply to throw thousands of dollars down the drain . Their job is to help students , so experts recommend you use them . Most students , however , are hesitant to take a trip to their college's counseling center , fearing being laughed at by peers . As a result , some schools like Texas Christian University , are testing students for mental health problems when they get sick and visit the campus health clinic . Take advantage of technology : Staying in touch with family members and friends from childhood and high school has become easier than ever with the coming of Facebook and video chat services like Skype . While mental health experts insist that it's important to make friends in your new environment and be involved in the college community , it's also significant to keep in touch with the people you knew before college . Go to sleep : Following a fairly regular sleep pattern can defend you against depression . In college , many students' sleep patterns are irregular thanks to late-night studying and partying , which is harmful to their mental health . Research strongly suggests that sleep is the key to learning and memory formation . Question: According to the passage , physical activity _ . Options: A: is regarded as the best way to fight depression B: contributes to the release of endorphins C: can't help the seriously depressed students D: improve people's ability to learn and memorize
B