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30．--How long has it you to wait for your friend?--About an hour．I don't know why he keeps me so long．A．taken,waiting B．cost,waiting C．taken,to wait D．spent,wait 【查看更多】

 

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--How long has it ________ you to wait for your friend?

--About an hour．I don't know why he keeps me ________ so long．

A．taken；waiting       B．cost；waiting             C．taken；to wait         D．spent；wait

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