试题出自试卷《河南省普通专升本《专业英语》真题（2019年）》

Want to stay away from colds? Put on a happy face.
Compared to unhappy people, those who are cheerful and relaxed are less likely to suffer from colds, according to a new study. It’s possible that being happy helps the body fight illnesses, said the researchers from New York University.
“It seems that positive feelings may reduce the danger of illness.” said the study’s chief researcher Sheldon Cohen. In an earlier study, Cohen found that people who were cheerful an lively caught coughs and colds less often. People who showed positive feelings were also less likely to tell their doctors that they felt ill.
In this study, Cohen interviewed 193 adults every day for two weeks. During the interviews, people told researchers about the happy or sad feelings they had that day.
After two weeks, people were given colds by doctors and had to stay alone in a room for six days. The results showed that everyone in the study was equally likely to get ill. But for people who said they felt happy during the research period, their illnesses were less serious and lasted for a shorter time.
Cohen believes that when people experience positive feelings, their body may produce a chemical that helps fight illnesses and diseases. So if you are worried about your health, look on the bright side more often.
1. Which of the following was NOT a part of the study?
2. What did the study find?
3. According to Cohen, which of the following may help fight illnesses?
4. This passage is a/an____.
5. What is the best title for this passage?