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
A
解析:
While这里表示对比关系。这里考查连词引导的状语从句。

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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
A
While这里表示对比关系。这里考查连词引导的状语从句。