Therescuers

問題詳情：

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】選A。考查詞組辨析。句意：救援人員一接到命令，就前往出事地點。set out to do開始做某事；set off開始（旅程、賽跑等）；set up建立，設立；set in以……為背景。

知識點：動詞

題型：選擇題