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----I have got a headache.
---- No wonder. You ________ in front of that computer too long.
A.workB.are workingC.workedD.have been working
D
考察时态。根据第一句我头疼,可知是过去发生的事情对现在的影响,。在根据too long可知应该使用完成进行时。句意:—我头疼。—难怪。你在电脑前面工作的时间太长了。
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