题目内容
11._____your sister happy?( )| A. | Are | B. | Is | C. | Am | D. | Be |
分析 你的姐姐开心吗?
解答 答案:B.考查系动词.句意"你的姐姐开心吗?".are复数.is单数.am通常与I连用.be原形.主语是sister单数,因此用is.答案是B.
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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