题目内容
7.Quietness seems impossible everyone takes their seats and begins to write.( )A. | until | B. | after | C. | for | D. | once |
分析 在每个学生坐好并开始写字之前安静好像是不可能的.
解答 答案:A.
until直到…为止;after在…之后;for做连词时表示原因;once一旦;根据前后的逻辑关系可知,不能安静和学生就坐后写字是有时间先后的,所以选A.
点评 until直到….为止,
肯定形式表示的意思是"做某事直至某时",动词必须是延续性的.
I slept until midnight.我一直睡到半夜时醒了. Wait till I call you.等着我叫你.
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