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Mary, stop to have a rest. You _________ the flowers in your garden for nearly two hours.
A.are wateringB.were watering
C.waterD.have been watering
D

试题分析:考查时态:句意:玛丽,停下来休息一下,你在花园浇花有两个小时了,说明浇花这个动作是从过去一直持续到现在,用现在完成进行时,选D。
点评:时态的考查要放在上下文的语境中进行,要注意抓住句子的关键词。现在完成进行时表达的动作是从过去到现在一直在进行的动作,有明显的时间暗示。
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