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--- Tommy is planning to buy a car.
--- I know. By the time he returns from abroad, he ________ enough for a used one.
A.will have saved B.saves C.had savedD.will save
A

试题分析:考查时态:句意:--Tommy正计划买个汽车。--我知道。到他国外回来的时候他将攒足够买一辆二手车的钱。By the time引导的是时间状语从句,用一般现在时代替一般将来时,所以主句应该是将来范畴的时态,而且时间状语是by the time连接的,主句用将来完成时。选A。
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。还要注意语态的正确使用。注意时间条件状语从句不能用一般将来时,应该用一般现在时代替一般将来时。连词by到…时为止;该词经常与完成时连用。
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