题目内容
-
I wonder how much you charge for your services.-
The first two are free ________ the third costs $30.[ ]
A.while
B.until
C.when
D.before
答案:A
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题目内容
-
I wonder how much you charge for your services.-
The first two are free ________ the third costs $30.A.while
B.until
C.when
D.before