【題目】It's necessary for you for an hour every day. It's good for your health.
A.exercise
B.wait
C.to exercise
D.to wait

【答案】C
【解析】句意:你有必要每天鍛煉一個(gè)小時(shí),這對(duì)你的健康有益。exercise鍛煉;wait等候;句型:It's+形容詞+for sb+to do sth 做某事對(duì)于某人來說……,it是形式主語,指代后面的動(dòng)詞不定式。所以此處用不定式,根據(jù)句意,所以答案是C。

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