神马作文网what to do与how to do
来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/11/23 19:30:25
The old lady didn't know ___when the house caught fire . A.how to do B.how to do it C.what to do D.what to do it
解题思路： 从语法角度分析，注意固定短语和句型，联系上下文，在具体的语境中选择正确答案。
解题过程：
The old lady didn't know ___when the house caught fire .
A.how to do B.how to do it C.what to do D.what to do it
正确答案：C 解析：do为及物动词，do sth. sth由what所取代
句子意思是"当屋子着火时老太太不知道做什么了。 如果选B的话, do的宾语是it,这个it指代不明。所以B不是正确答案 A.缺do的宾语 D.What 与 it重复了,do只能有一个宾语， 故正确答案为：C what to do
最终答案：略
解题过程：
The old lady didn't know ___when the house caught fire .
A.how to do B.how to do it C.what to do D.what to do it
正确答案：C 解析：do为及物动词，do sth. sth由what所取代
句子意思是"当屋子着火时老太太不知道做什么了。 如果选B的话, do的宾语是it,这个it指代不明。所以B不是正确答案 A.缺do的宾语 D.What 与 it重复了,do只能有一个宾语， 故正确答案为：C what to do
最终答案：略
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