单项选择题

Doctors hold laughter clinics ______.

A．to give better condition to their patients
B．in order to improve patients' health
C．to make patients smile
D．to prove smile and laughter have the same effect

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单项选择题

This underlined word diminish is similar to ______.

A．test
B．stop
C．reduce
D．increase

单项选择题

Doctors have proved the following EXCEPT that（）

A．smiling does good to health
B．laughter can be tolerated
C．there is a way to reduce pain
D．laughter can work the muscles in the feet