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选什么：Imustapologizefor___aheadoftime.(A)lettingyounotknow(B)notlettingyouknow(C)lettingyouknownot(D)lettingnotyouknow
题目内容：
选什么：I must apologize for___ahead of time.
(A)letting you not know
(B)not letting you know
(C)letting you know not
(D)letting not you know
优质解答
选B.
动名词的一般式的否定式是在动词前加not,not不能加在后面.
(A)letting you not know
(B)not letting you know
(C)letting you know not
(D)letting not you know
优质解答
动名词的一般式的否定式是在动词前加not,not不能加在后面.
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