—I wonder if you could go with me to the supermarket.—Sorry. I my experiment report all t

—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

A. write　　　B. was writingC. have written (答案→)D. have been writing解析：考查时态。本意的关键词是all the morning整个早晨，该时间状语常常与现在完成进行时连用。句意：—我想知道你是否和我一起去超市.—对不起。整个上午我都在写实验报告，我还没有写完。根据句意说明草早上开始到现在一直都在写实验报告。故使用现在完成进行时表示过去发生的倒装一直持续到现在。故D正确。

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