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    8． When he the door, he found his keys were nowhere. A. would open B. opened C. had opened D. was to open 答案 D 解析 考查非谓语动词.动词不定时的用法.句意为:当他要打开门的时候,他发现他的钥匙不见了.动词不定时表示将要发生的动作. 【查看更多】

     

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