fire all safety rules must be kept clear.A. In place ofB. Instead ofC. In case ofD. In s

问题补充：

fire, all safety rules 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：介词短语辨析。A代替；B而不是；C以防；D尽管，不管；句意：以防火灾，所有的安全规章都要很清楚。根据句意说明C正确。