题目内容

The candidate was about to get in the car _ suddenly a man with a mask appeared and shot at him.
A.whileB.afterC.asD.when
D
考查固定句型。be about to do sth when…正要做某事…在这时…句意:那位候选人正要上车,在这时突然有个带着面具的男的出现并且朝他射击。
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