_I must apologize for__ahead of time._that is all right.

_I must apologize for__ahead of time._that is all right.
A letting not you know B not letting you know C letting you know not D letting not you know
是个对话
英语人气:406 ℃时间:2019-10-19 15:48:53
优质解答
B not letting you know
for介词介词后面用动名词
not在动名词前表示否定
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