It is necessary that a person______exercises everyday if he wishes to be healthy.

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问题 It is necessary that a person______exercises everyday if he wishes to be healthy.

选项 A、do
B、does
C、did
D、must do

答案A

解析 本题题干意思为“如果想健康的话,那人们很有必要每天做运动”。在句型“It is necessarythat…”中,从句的动词需要为动词原形。所以答案为A)。
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