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---Imustapologizefor

練習題2.15W

問題詳情:

---Imustapologizefor

---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

【回答】

B

知識點:非謂語動詞

題型:選擇題