— Have you finished _______ your position? It is time to hand it in.— Not yet, I _______ it the whole morning, but it is so hard that I only finished half of it.A.writing; had writtenB.write; wroteC.written; was writtenD.writing; have been writing
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D解析考查动词用法和时态。Finish doing sth完成某事。第二空后的时间状语是the whole morning整个上午，指整个上午我一直在写作文，强调动作的持续性和反复性。故使用现在完成进行时。综合D正确。