问题详情:
The rescuers_________to head for the spot where the accident happened as soon as they got the order.
A set out B. set off
C. set up D. set in
【回答】
【解析】选A。考查词组辨析。句意:救援人员一接到命令,就前往出事地点。set out to do开始做某事;set off开始(旅程、赛跑等);set up建立,设立;set in以……为背景。
知识点:动词
题型:选择题