Yesterday evening I ________ a book on science.I'll try to finish it today.

[  ]

A.read
B.have read
C.had read
D.was reading

答案:D
解析:

過去進(jìn)行時表示過去某時刻或某段時間正在進(jìn)行的動作或情況,敘述一個未完成的過程;而一般過去時只表示發(fā)生了的動作或情況,答案為D.試比較:

They were building a bridge there

他們在那里修一座橋.(不一定建成)

They built a bridge there

他們在那兒修了一座橋.(已建成)

We were making preparations for the conference

我們正在做會議的準(zhǔn)備工作.

We made all the preparations for the conference

我們花了一周時間做好一切準(zhǔn)備.


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