题目内容：

过去进行时练习：用动词的适当形式填空
11.They _____(not make) a model ship when I saw him.
12._____ they ____ (have) a meeting at 4 yesterday afternoon?
No,they _____.They _____ (clean) the classroom.
13.______ it ______(rain) when you left school?Yes,it ____.(No,it ____)
14.What _____ your father _____ (do) when he was your age?
15.One day,Edison _____ (wait) for a train to arrive,and suddenly a little boy ran to the track(轨道) to play.
16.He asked me if I ______ (go) fishing that afternoon.
17.The three of them were in a hurry because their plane _____ (leave) in five minutes.
18.In a letter,john told us that he _____ (come) to china next month.
19.When the bell rang,jenny _____ (wait) in her seat.
20.She _____ (make) her dress the whole afternoon.
21.While my father ____ (look) through the evening paper,he suddenly ____ a cry.