单项选择题

What is the purpose of Winfred's research

A．The components of tears.
B．Why some people cry more often than others.
C．How tears help us deal with emotional problems.
D．Whether crying really helps people reduce stress.

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单项选择题

Which of the following is NOT true to the passage

A．Tears can help to protect our eyes.
B．Teenage girls cry four times as often as boys.
C．People who cry more must feel better than otherwise.
D．We cannot imagine life without tears.

单项选择题

What's the difference between human beings and other animals when shedding tears

A．Human beings can control their tears shedding much better than animals.
B．Only human beings respond to emotions by shedding tears.
C．Only human beings shed tears to get rid of irritating stuff in their eyes.
D．The animals' tears are the response to physical or chemical stimulation.