【題目】—Staying up late ____ bad for your health.

—I’ll go to bed right away.

A. is B. are C. was

【答案】A

【解析】句意:--晚睡是對你的健康有害的。--我馬上就睡覺。動詞ing形式staying up late是句子的主語,此句表示的概念性的動作,而且是單一概念,故謂語動詞用一般現(xiàn)在時,單數(shù)形式。故選A。

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