Question

【题目】There are so many foggy days these days. We all want to know.
A.How we can do to prevent it
B.How can we do to prevent it
C.What we can do to prevent it
D.What can we do to prevent it

Answer 1

【答案】C
【解析】句意：这些日子有许多雾天，我们都想知道如何做来阻止它。此句是一个宾语从句，应该用陈述句的语序，根据语序，排除B,D；how为疑问副词，do后缺少宾语，故A不对；what为疑问代词，作do的宾语，不定式作目的状语。所以答案是C。