Thedoctortoldmetotakethemedicine 　　　　.  A.everyfourthh...

问题详情：

 The doctor told me to take the medicine 　　　　.

  A. every fourth hours            B. each fourth hour

  C. each four hours              D. every four hours

【回答】

D

知识点：词组 短语

题型：选择题