问题

We will give you a good price ________ you are thinking of buying it.
A:until
B:and
C:so that
D:if ;
B:and
C:so that
D:if ;
正确答案是:
同类题型
The light ________ and the room became complete dark.
I’d like to join the school volunteer project, but I’m not sure _____.
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If you want more classmates to make the show successful, you can say, “_________.”