—___________ I come in, Mr. Green?
—Yes, come in, please.

A. Must
B. May
C. Need
B
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科目:小學(xué)英語 來源:期中題 題型:單選題

— _____________ I come in, Mr. Green?
— Yes, come in, please.
[     ]
A. Must
B. May
C. Need

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