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
网友回答
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。