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【题目】It is of great importance _______ parents say and do in family life, which may have a life-long effect on their children.

A. what B. that

C. how D. why

【答案】A

【解析】

试题分析:A.什么;B. 引导词;C.表示方法和程度,怎么样;D.为什么;

It为形式主语,真正的主语为what引导的从句,what在从句中作say和do的宾语。

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