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Li Hua often to school.

A. walk B. walking C. walks

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There is an old saying in English, “Laughter is the best medicine”. Until recently, few people took the saying very seriously. Now, however, doctors have begun to study laughter and the effects (作用) it has on the human body. They have found evidence that laughter really can improve people’s health.

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B. more effects than laughter

C. fewer effects on the human body

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