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Walmart, which is one of the largest American supermarket chains, _______ some of its store open 24 hours on Mondays through Saturdays.
A.keepB.keepsC.have keptD.had kept
B

试题分析:句意:美国最大的连锁超市之一沃尔玛,从星期一到星期六会使它的一些商店保持24小时营业。谓语动词是keep,句子表明的是一般的情况,故用一般现在时,故选B.
点评:时态是高考英语的重点,单项选择中15道有一半都是动词时态或是语态题。可见它的重要性,所以平时要分清楚16种时态的异同,并辅助以题目进行加强巩固,对复习阶段不懂的一定要多问,并对所积累的知识进行背诵。
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