用所给动词的适当形式填空

Look at the sky. It ________ (snow).

用所给动词的适当形式填空

They will go out for a walk if it ________ (not rain).

用所给动词的适当形式填空

She ________ (not watch) TV when I knocked at the door.

用所给动词的适当形式填空

When I ________ (leave) my office, it ________ (rain) heavily last night.

用所给动词的适当形式填空

After we ________ (move) away the bag, the teacher let us go home.

用所给动词的适当形式填空

He saw it happen when he ________ (cross) the road.

用所给动词的适当形式填空

　　________the twins ________ (sit) under the tree at that time.

　　Yes , they were.

用所给动词的适当形式填空

The man ________ (lie) on the road. He was badly hurt.

用所给动词的适当形式填空

When I came into the room, Lily ________ (write) a letter.

用所给动词的适当形式填空

While the children ________ (sweep) the floor, their mother came home.