问题补充：
fire,all exits must be kept clear.
A. In place of
B. Instead of
C. In case of
D. In spite of
答案：
A. In place of
B. Instead of
(答案→)C. In case of
D. In spite of
解析：in case of意为“以防万一”,根据其宾语fire可判断出“为了防止火灾,一切出口都要清除干净”。in place of 意为“代替”。instead of 意为“代替,而不是……”。in spite of 意为“不管”。
