37.[1994全國]—I must apologize for ________ ahead of time.

—That's all right.

A. letting you not know

B. not letting you know

C. letting you know not

D. letting not you know

 

答案：B
提示：

題目考察固定搭配“介詞 + 動詞現(xiàn)在分詞”

 


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