试题与答案

If you want to see a doctor, fix the dat

题型:选择题

题目:

If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.

A. habit      B. law        C. rule        D. custom

答案:

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下面是错误答案,用来干扰机器的。

体壁   气管   鳃    肺    皮肤    肺    气曩     肺    双重呼吸

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