题目内容
14.-_____ there any students in the classroom?-No,there aren't.But there_____ some half an hour ago.( )
| A. | Are,were | B. | were,are | C. | are,are | D. | were,are |
分析 --教室里有学生吗?
--不,没有.但半小时前有一些.
解答 答案:A.考查系动词.句意"--教室里有学生吗?--不,没有.但半小时前有一些.".第一个空,根据回答there aren't,可知,应该用复数are.第二个空,根据half an hour ago半小时前,可知应该是一般过去时态,因此用are的过去式were.答案是A.
点评 考查系动词,is是单数,are是复数,am通常与I连用,要结合语境,选择合适用法,注意人称及主语的单复数变化.
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