摘要： - I come in? -Yes, please.

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________ I come in ? Yes, please.

A.
May
B.
Must
C.
Can
D.
Need

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________ I come in ? Yes, please.

[　　]

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________ I come in ? Yes, please.

[　　]

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—May I come in?
.

A. No please
B. Of course
C. Yes, you may
D. It doesn't matter

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－________ I come in?

－Yes, please．

May

Must

Should

Am

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