The police officers in our city work hard the rest of us can live a safe life.A. in caseB

问题补充：

The police officers in our city work hard the rest of us can live a safe life.

A. in case

B. as if

C. in order that

D. only if

答案：

A. in case

B. as if

(答案→)C. in order that

D. only if

解析： 词义辨析。in case以免，以防；as if 仿佛，好像；in order that为了；only if只要就，只有。句意：我们城市的警察们努力工作为的是让我们能过上安全的生活。所以选C。