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.
while
until
when
before