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I’m sure David _________ when we get home.
A.is still sleeping B.is to be sleeping
C.will still be sleepingD.will have been sleeping
C

试题分析:考查时态:句意:我确定当我们到的时候,大卫将正在睡觉。When引导的时间状语,用一般现在时表示一般将来时,主语应该是将来范畴的动作,而且当我们到的时候,大卫是正在睡觉。选C。
点评:时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态,在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。
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