------When can I see you Mr Black? Three o’clock this afternoon?------Oh no. I a meetin

问题补充：

------When can I see you, Mr Black? Three o’clock this afternoon?

------Oh, no. I a meeting then.

A. will have

B. will be having

C. am having

D. have

答案：

A. will have

(答案→)B. will be having

C. am having

D. have

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