1.Ann is very tired because she ___for hours.
a.typed b.types c.is typing d.has been typing选c为什么不对?我知道正确答案,可我想知道为什么选C不对?
那选C代表什么？
人气：381 ℃ 时间：2019-10-19 12:57:02
解答
应该选D
C不对是因为时态不对,句子中应该是完成时,安非常疲倦,因为她已经打字打了几个小时.用C的话,就是安疲倦是因为正打字打了几个小时,说不通,有for hours 得句子,一般都是用完成时.
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