31．—Will you go fishing with me?
— .
A. No, I'll be very busy
B. Yes, I'll be glad
C. Certainly, I'll be sorry
D. Certainly, I'll be glad to
网友回答
A. No, I'll be very busy
B. Yes, I'll be glad
C. Certainly, I'll be sorry
(答案→)D. Certainly, I'll be glad to
解析：可联系答.案.网客服索取。