You look tired!Yes,I ----compurter games for two hours.选什么,为

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You look tired!Yes,I ----compurter games for two hours.选什么,为什么?
You look tired!
Yes,I ----compurter games for two hours.
A,play.B,was playing.C,have been playing.D,am playing
选什么,为什么?

C,
play是一般现在时,突出不了现在的意味；was playing是过去进行时,是纯粹的过去,和现在无关联；am playing只是片面地说明了现在的情况,这三个答案都和时间状语的for two hours不符合,因为这两个小时里有纯粹过去的时间,还有刚刚过去的时间以及此时此刻的时间,而have been playing是现在完成进行时,它所对应的时间正好和for two hours完美呼应了.
再问：谢谢，不过有一个小问题，是不是因为tired，表明对自己有影响，所以选现在完成进行时，可我个人认为，既然是for two hours，那正在进行时am playing因该也可以说得过去吧，，，
再答： am playing不能和表示一段时间的状语for two hours连用的；因为这两个小时里有过去的时间，可在am playing中却找不到过去的时间，am playing表明的是纯粹现在的时间。

You look tired!Yes,I ----compurter games for two hours.选什么,为 You look tired after search for the missing boy Yes I'd pref you look tired yes i_non You look so tired .yes,I have been playing basketball You look very tired.Yes I do Christmas sh you look tired.-yes,I non-stop until 8 oclock. i often play basketball for two hours.i don;t feel tired.同义句根据句意写单词 I am too tired.I need to ( ) myself for two hours. I often play football for two hours .I don't feel tired.(将两句 play ,games ,for,did,two,hours,you,computer（连词成句）英语 I usually play computer games for two hours every day.那里面 -How long did you skate?-I skated for two hours.