单项选择题

Professor Smith， May I ask you a few questions（）

A. Glad to meet you.
B. I’m not sure.
C. Go ahead.
D. No, thanks.

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单项选择题
Be sure to write to us,（）

A、will you
B、aren’t you
C、can you
D、can’t you
填空题
He (success)（）in writing a book with the help of his father.
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