Ifyouwanttoseeadoctor,youshouldmakeanappointmentwithhi...

问题详情：

 If you want to see a doctor, you should make an appointment with him in advance. That’s a common ______ in the U.S.

   A. habit           B. practice         C. tradition             D. custom

【回答】

B

知识点：名词

题型：选择题