[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. thatC. how D. why 题目和参考答案——青夏教育精英家教网—

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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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