问题

If you _____ smoke, please go outside because this is a non-smoking office. [ ]
A: must
B: should
C: can
D: may
B: should
C: can
D: may
正确答案是:
同类题型
Don’t forget ______ thanks when other people help you.
My grandfather doesn’t have any hobbies — __________ you call playing cards a hobby.
I am so sorry that I forgot to bring any food with me. And it’s kind of you to share _____with me.
of $5, 000 forthe arrest of the murdered, according to the news on TV last night