【題目】I think _______ is important for us to go to bed early every night.

A. itB. thatC. oneD. this

【答案】A

【解析】

句意：我認(rèn)為每天晚上早點上床睡覺對我們很重要的。本題考查句型：It's+形容詞+for/of sb.+to do sth. 做某事對于某人來說……，it是形式主語，指代后面的動詞不定式。選項B/C/D不能做形式主語。故答案為A。

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