问题
选择题
If you want to see a doctor,you fix a date with him ahead of time.That is a common __________ in the USA.
A.sense B.practice C.rule D.reality
答案
答案：B
a common practice惯例。
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If you want to see a doctor,you fix a date with him ahead of time.That is a common __________ in the USA.
A.sense B.practice C.rule D.reality
答案：B
a common practice惯例。