题目内容：

Mary bought a dress in a women's clothing store.She felt very happy about buying the dress until she got home. Then she remembered she had left her purse at the store.It was the third time that month that Mary had forgotten something important.Mary was angry with herself.She said,“Am I losing it?”

Emma was teaching a class in mathematics at a college.She began to explain to the students how to solve a very difficult problem.She understood it very well.But somehow,at that moment,she could not explain it.Emma said,“I must be losing it.”

Americans seem to have a lot of concern about losing it.At least that is what you would think from hearing them talk.They use the expression when they feel they are losing control.It can mean losing emotional control.Or losing the ability to do something.Or losing intelligence.

Word experts differ about how the expression started.Some believe it came from television programs popular in the 1980s.Others believe it began with psychologists,who deal with how people think,feel and act.

“We Americans have many concerns about controlling our lives.Perhaps we worry too much,”one psychologist said.“In many situations to say you are losing it eases the tension（不安）.”

It’s healthy.And most people who say they are having a problem are not losing it.

People may feel more like they are losing it when they are “down in the dumps”.Word expert Charles Funk says people have been feeling down in the dumps for more than 400 years.The word dumps probably comes from Northern European countries.The languages of Denmark and Norway both have similar words.The words mean to fall suddenly.Americans borrowed this saying.And,over the years,it has become a popular way of expressing sadness.

1.What problem did Mary think she had?

A. She easily lost emotional control.

B. She had quite low intelligence.

C. She seemed to have a poor memory.

D. She lost the ability to shop wisely.

2.How does the author explain the use of losing it?

A. By describing his own experiences.

B. By providing research findings.

C. By giving instructions.

D. By using examples.

3.We can infer from the psychologist that       .

A. Americans worry too much about their health problems

B. it’s good for your health to say you're losing it

C. people really lose it when they say they're losing it

D. Americans enjoy controlling their lives

4.If someone feels down in the dumps,he or she       .

A. is in low spirits    B. is losing something

C. becomes less popular    D. has a sudden fall in life