题目内容：

When people reunite with their loved ones, it's usually all extremely happy moment. But what is their most common response to seeing them again? It may seem strange, but most of the time they break down in tears.

Now a group of psychologists (心理学家) from Yale University say they have found the reason why, and that crying tears  of joy may well be the body's way of keeping emotional(情感的）balance.

“They seem to take place when people are overtaken by strong positive emotions, and people who do this seem to recover better from those strong emotions, ”Oriana Aragon, the lead researcher said.

Aragon and her fellow psychologists looked at hundreds of participants’ emotional responses to different things, including happy reunions and cute babe. Many participants said they would react in a negative or aggressive  way to the positive things to cry at happy moments and want to pinch(捏) a  cute baby's face or even, tell them“I want to eat you up!” But then researchers found that these people were able to calm down from strong emotions more quickly.

There are many other examples of times when people respond to a positive experience with a negative emotional reaction, At an exciting concert, fans scream at their idols(偶像).People who have just had a big lottery win are often in floods of tears* “These findings advance our understanding of how people express and control their emotions, which is importantly related to mental and physical health, the quality of relationships with others, and even how well people work together/' said Aragon.

1.What have the psychologists from Yale University found in their research?

A. Crying tears of joy helps to balance emotions.

B. The reason why people cry with tears.

C. People recover slowly from strong emotions

D. Strong negative feelings are useful to people.

2.What does the underlined “they” in Paragraph 2 probably refer to?

A. Times when people reunite with friends.

B. Participants’emotional responses.

C. Times when people cry tears of  joy.

D. Strong    positive emotions.

3.Which of the following agrees with the findings of the research?

A. Kissing a cute baby.    B. Crying at good news.

C. Crying at a failure.    D. Laughing at happy reunions,

4.Where does the passage most likely come from?

A. A popular biology book.    B. A children literature book,

C. A science fiction novel.    D. A psychological science journal.