单项选择题

Which of the following statements is NOT true of laughter, according to the passage

A．It reduces pain,
B．It exercises the body.
C．It improves the body's immune system.
D．It can cure cancer.
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单项选择题
Freud believed in all of the following statements about the wish-fulfilling dream EXCEPT
A．It has a very important function.
B．It satisfies our unfulfilled desires.
C．Dreams of this type are usually very sweet.
D．Dreams of this type always last long.
单项选择题
The writer's attitude towards laughter is
A．critical.
B．doubtful,
C．positive.
D．negative.
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