Question

Reportedly yesterday a group of American soldiers were walking along the road in Irap when a bomb was ______ .

A．set out

B．set about

C．set off

D．set up

Answer 1

C

短语辨析。A动身，出发；B开始做…;C 开始，引爆；D设立，建立；句意：据报道，昨天一群美国士兵正在伊拉克巡逻，在这时一颗炸弹被引爆了。根据句意说明set off在本句中指引爆，故C正确。
点评：动词set短语是高考重点，set out ,set about，set off等都重要，平时注意对这些短语的识记。