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1) Shirley ______ a book about China last year but I don’t know whether she had finished it．
A. has written B. wrote
C. had written D. was writing
D
2) Mary ____?a dress when she cut her finger.
A. made? ?B. is making
C. was making ? D. makes
was making 表示正在做衣服的过程，如用made 则表示这一动作已结束，做衣服的动作已结束与 cut her finger 就没有联系。
C
3) He ______ (write) a letter, then went to bed.
wrote
wrote 表示动作已结束，做另一件事，如用was writing 就与 went to bed 在逻辑上相矛盾。
过去进行时侧重表示动作延长的时间长度; 一般过去时表示过去某时发生过某事，侧重说明事实。
He ___________ all night last night.
（生动的描写，他一直写……）
He ________ something last night．
（说明他写了……的事实）
was writing
wrote
注：下列几类动词通常不用过去进行时。
① 表示状态的动词 be；
② 感官动词：feel, hear, see, smell, taste等;
③ 表示思维或心理状态的动词：believe (认为), forget, consider, know, remember, hope, wish, want 等；
④ 表示所属关系的动词：belong, have, own, hold (容纳)等。
1 Fill in the blanks with when or while.
1. ________ I was walking home from
school, I saw a strange light in the sky. But ________ I pointed it out to my friend, it went away.
While
when
2. ________ I told my older brother about the strange light in the sky, he just laughed and didn’t believe me.