题目内容
The old lady didn’t know when the house caught fire.A.how to do | B.how to do with it | C.what to do | D.what to do it |
C解析:
what+to do形成固定短语做know的宾语。
what+to do形成固定短语做know的宾语。
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题目内容
The old lady didn’t know when the house caught fire.A.how to do | B.how to do with it | C.what to do | D.what to do it |