The police ______ the tear gas bombs to drive the rioters.

The police ______ the tear gas bombs to drive the rioters.
A、set out
B、set on
C、set off
D、send out
【正确答案】:C
【题目解析】:本题考查词组辨析。A.set out:出发,动身;B.set on:袭击,唆使;C.set off:出发,开始做,使爆炸;D.send out:发出,寄出。根据题意,“警察发射催泪瓦斯以赶走骚乱者。”C符合题意。答案为C。