Mary Jones 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 credit card at the store when she used it to pay for the dress.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 Cleveland 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，“ ____________”

　　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 mental powers.

　　One psychologist said，“We Americans have many concerns about controlling our lives.Perhaps we worry too much.”

　　She continued，“In many situations，to say you are losing it eases the tension.It is 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”．People who are down in the dumps are sad.They are depressed.

　　Word experts do not agree what the word “dumps” means.One expert，John Ayto，says the word “dumps” probably

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