-----I wonder if you could go with me to the supermarket.
------- Don’t disturb me. I _____________my experiment report all the morning and haven’t finished yet.
A．writeB．was writingC．have writtenD．have been writting
D

試題分析：表示動(dòng)作從過(guò)去某一時(shí)間開(kāi)始一直持續(xù)到現(xiàn)在，并且有可能持續(xù)下去，故用現(xiàn)在完成進(jìn)行時(shí)。
點(diǎn)評(píng)：這道題目難度適中，在平時(shí)的學(xué)習(xí)中，認(rèn)真掌握好各個(gè)時(shí)態(tài)的用法，不難做出解答。
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