问题
You should talk to your parents and you will get help ________ you have a problem.
A:unless
B:if
C:until
D:so;
B:if
C:until
D:so;
正确答案是：
同类题型
Look at the sign! Smoking ________ here.—I’m really sorry. I’ll stop right now.
Journalists should always be in what they write.
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Put your heart into it, you can’t learn well.
By no means _____ true that all English people know their own language well. [ ]