—I wonder if you could go with me to the supermarket.—Sorry. I _______ my experi

题干

—I wonder if you could go with me to the supermarket.
—Sorry. I _______ my experiment report all the morning and haven’t finished yet.

A．write	B．was writing
C．have written	D．have been writing

上一题下一题 0.85难度单项选择更新时间:2013-03-28 07:04:40

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