You had better book rooms at the hotel in advanceyou should find no room on your arrival.A

问题补充：

You had better book rooms at the hotel in advanceyou should find no room on your arrival.

A. so that

B. even if

C. in case

D. now that

答案：

A. so that

B. even if

(答案→)C. in case

D. now that

解析：考查连词：A.so that为了，因此，B.even if既然，C.in case以防， D.now that既然，句意：你最好提前在旅店预定旅馆以防你到的时候没有房间。In case这里连接目的状语从句，选C。