Read the following article and answer the question. Article: In our daily lives, Wechat is really hot now. Many people express themselves, exchange ideas and deliver information by Wechat. There are a number of reasons for Wechat to be popular. To begin with, Wechat is a cheap way of communication, which cuts down a great deal of the cost made by phone calls. Next, Wechat is to the taste of the most of people. Its attractive and lots of functions are loved widely. What's more, convenience also leads to its popularity. It is _ no matter where we are. However, it has problems, too. First of all, our IDs might be revealed when we use Wechat and we could be in danger. Secondly, we may spend more time on Wechat instead of with our family. As a result, relationship could break down. The last problem is that our attention might be drawn too much and sometimes we may find it difficult to focus on study. There is no doubt that Wechat will improve as time goes by. So let's look forward to the better Wechat and have more fun with it. Question: Using Wechat could be dangerous because _ Answer:
OPTIONS:
- relationship could break down
- IDs might be revealed
- it's difficult to focus on study
- spending too much time on Wechat

Answer: IDs might be revealed

Read the following article and answer the question. Article: Zhang Kai is a student at North China University of Water Resources and Electric Power . He has led a group of college student volunteers since last year. They help children at a primary school with their studies and daily lives. "When I was a small child", Zhang said, "I knew March 5 was a day for people to learn from Lei Feng and help others, but I didn't know the real meaning of the spirit of Lei Feng. Now when I see the smiling faces of the kids I have helped, I deeply understand Lei Feng. Helping others makes me happy." Lei Feng (1940-1962) is one of the most famous soldiers in Chinese history. He lost his parents when he was very young. His neighbors brought him up. He died in an accident at 22. He did many good deeds in his short life. For example, he gave his own money to the parents of another soldier. And bought tickets for a woman he didn't know without telling her his name. On March 5, 1963, Chairman Mao called on people to "Learn from Lei Feng" and made the day "Lei Feng Day". Today almost 50 years has passed since Lei's death. Some people say that the spirit of Lei Feng is outdated . But many people think we need to promote that spirit again. There have been many reports about the coldness of people toward strangers. This has made many Chinese people think deeply about themselves. "The most important thing is that we must be ready to help others and make it a habit." said Huang Tianze, a student from Jianlan High School in Zhejiang. Question: Which of the following is TRUE? Answer:
OPTIONS:
- Lei Feng died on March 5, 1963.
- March 5 this year is the 60th"Lei Feng Day".
- People remember Lei Feng because his wife was short
- Lei Feng did many good deeds during his short life.

Answer: Lei Feng did many good deeds during his short life.

Read the following article and answer the question. Article: In America, most people don't get enough sleep. Children aged 5 to 12 are advised to sleep 10 to 11 hours every night, but most of them can't sleep that long. A study found that about 41 million American workers got less than six hours of sleep every night. Scientists worry that parents are passing their bad sleeping habits down to their children. In the study, Reut Gruber and some other scientists either added or reduced on hour of sleep for healthy children aged 7 to 11. They watched the children for five nights. They wanted to know if the amount of sleep can affect a child's behavior. Before the study began, students were asked to sleep the same amount of hours as usual. Their teachers were asked to record their behavior. After five nights of the records, scientists found that those who slept one hour less behaved worse than those who slept one hour more. Students with less sleep were more likely to feel sad and had more problems paying attention. The scientists chose to study children in their homes instead of in a laboratory, because they wanted to find out how everyday changes might affect children's behavior at school. "In the study, nobody became a talent, and nobody became crazy. But small changes in children can really make a big difference," says Gruber. Question: Who helped do some new study, children with less sleep _ . Answer:
OPTIONS:
- Teachers.
- Parents.
- Scientists.
- Psychologists.

Answer:
Teachers.