May I smoke here?- If you choose a seat in the smoking section.A. shouldB. couldC

问题补充：

--- May I smoke here?

--- If you , choose a seat in the smoking section.

A. should

B. could

C. must

D. may

答案：

A. should

B. could

(答案→)C. must

D. may

解析：考查情态动词。Should 意为应当，竟然 could 可能，能够 must必须，一定，非要，偏要 may可能，可以

句意为，----我可以在这吸烟吗？

-----如果你偏要吸的话，选择吸烟区的座位。