题目内容
7.He ______when the UFO arrived.He didn't wake until the UFO disappeared.( )A. | slept | B. | was sleeping | ||
C. | was doing homework | D. | was singing |
分析 当不明飞行物到达时,他正在睡觉.直到不明飞行物消失,他才醒来.
解答 答案:B 根据He didn't wake until the UFO disappeared可知,前句应该是指"他正在睡觉",排除CD;又根据when the UFO arrived,时间状语从句是一般过去时态,主句该用过去时行时态,表示过去某一时刻正在做某事.其构成形式是助动词"was/were+动词-ing".故选B.
点评 判断动词的时态,要通过所给的时间状语、提示词或语境去判断动词存在的状态.本题考查过去进行时态.
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