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:A以防,万一B似乎,好像C为了,目的是D只有……(才);唯一的条件是……”句意:警务人员在我们城市里辛勤工作目的是使我们能过着安定的生活。