31．—Will you go fishing with me? —.A. No I'll be very busyB. Yes I'll be gladC. Certainl

问题补充：

31．—Will you go fishing with me?

—.

A. No, Ill be very busy

B. Yes, Ill be glad

C. Certainly, Ill be sorry

D. Certainly, Ill be glad to

答案：

A. No, Ill be very busy

B. Yes, Ill be glad

C. Certainly, Ill be sorry

(答案→)D. Certainly, Ill be glad to

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