I haven't finished my composition. I ________ for two hours and a half.A．have wr

题干

I haven't finished my composition. I ________ for two hours and a half.

A．have written it	B．have been writing it
C．wrote it	D．am writing it

上一题下一题 0.4难度单项选择更新时间:2014-11-24 09:18:28

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