You had better book rooms at the hotel in advance you should find no room on your arrival.
A. so that
B. even if
C. in case
D. now that
网友回答
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。