fire all exits must be kept clear. A. In place ofB. Instead ofC. In case ofD. In spite

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：

C。比较：in place of意为“代替”，instead of意为“取代”“而不是”，in case of意为“万一”，in spite of意为“尽管”。根据句意，选C最佳。句中的clear为形容词，意思是“无阻塞的”“无障碍的”，如： Wait until the road is clear (of traffic) before crossing. 等路上无车辆来往时，再穿过马路。题干的意思是：万一发生火灾，所以出口必须清空。