- Has your friend completed his design?   - Not yet. He ________ on it last night.

A．worked B．has worked C．is working D．was working

D

解析試題分析：句意：—你的朋友完成了他的設(shè)計了嗎？—還沒有。昨晚他一直在做。A. worked一般過去時，說明過去的情況，與現(xiàn)在無關(guān)；B. has worked現(xiàn)在完成時，說明現(xiàn)在已經(jīng)完成；C. is working現(xiàn)在進(jìn)行時，表示現(xiàn)在正在做的事；D. was working過去進(jìn)行時，表示過去某個時間或時間段內(nèi)正在做的事。分析句意可知用過去進(jìn)行時。故選D。
考點：考查動詞時態(tài)的用法。

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