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-May I come in? - . [ ] A. Who is it? B. Who are you? C. Who is he? D. What's th

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-May I come in? - . [ ] A. Who is it? B. Who are you? C. Who is he? D. What's th

—May I come in?

—___________.

[    ]

A. Who is it?   B. Who are you?

C. Who is he?   D. What's there?

试题答案

答案:A