摘要:第一节 单项填空(共15小题,每小题1分.满分15分) 从A.B.C.D四个选项中.选出可以填入空白处的最佳选项.21.-I have got a headache. -No wonder.You in front of that computer too long. A.work B.are working C.have been working D.worked 答案与解析:C 由I have got a headache可知用现在完成进行时态.表示过去开始的动作对现在造成的影响或结果.

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