问题
May I smoke here?—If you _______, choose a seat in the smoking section.
A:should
B:could
C:may
D:must
B:could
C:may
D:must
正确答案是：
同类题型
— Hi, Torry, can I use your computer for a while this afternoon? — Sorry. _____. [ ]
.The teacher told us the sun rises in the east in class yesterday.
The number of English learners ________ increased.
When did you go to bed last night, Tom—-At 10 pm. But my mother___________,
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