Question

【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

Answer 1

【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。