题目内容
16.It__________ heavily when I left the library.( )A. | rains | B. | will rain | C. | is raining | D. | was raining |
分析 我离开图书馆的时候雨下得很大.
解答 答案:D rains-一般现在时态;will rain-一般将来时;is raining-现在进行时;was raining-过去进行时.根据when I left the library-当我离开图书馆的时候,说明当时什么事情正在发生,所以要用过去进行时,故选D
点评 此题解题关键是when 引导的时间状语从句,它是过去进行时的时间标志,以此为依据解答题目.
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