题目内容


9. 一I must apologize_____ you know ahead of time.
一That’s all right.
A.for letting notB.for not letting
C.to let notD.not to let
B
不定式或动名词的否定式均须在其前面加not,never,可先排除A、C两项。动词apologize后要接for短语,常用:apologize to sb.for doing/having done sth.,不能接动词不定式。故选B.
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