用所给动词的适当形式填空：

( use, operate, work, fall, eat, produce, give, move, understand, walk, play)

The dustman swept the ________ leaves on the ground.

用所给动词的适当形式填空：

( use, operate, work, fall, eat, produce, give, move, understand, walk, play)

In autumn, the peasants often had their tractors ________ all day long.

用所给动词的适当形式填空：

( use, operate, work, fall, eat, produce, give, move, understand, walk, play)

Did you notice anyone ________ behind you on your way to the cinema? It was me.

用所给动词的适当形式填空：

( use, operate, work, fall, eat, produce, give, move, understand, walk, play)

Who is the man ________ on?

用所给动词的适当形式填空：

( use, operate, work, fall, eat, produce, give, move, understand, walk, play)

The gas appeared ________ up.

用所给动词的适当形式填空：

(follow, listen, give, play, come, go, be, build, wait, set, dress)

we often see the naughty boy ________ to school late.

用所给动词的适当形式填空：

(follow, listen, give, play, come, go, be, build, wait, set, dress)

Though Mark Twain often played jokes on others, this time the joke ________ on him.

用所给动词的适当形式填空：

(follow, listen, give, play, come, go, be, build, wait, set, dress)

I had to think of a way to prevent him from ________ around all the morning.

用所给动词的适当形式填空：

(follow, listen, give, play, come, go, be, build, wait, set, dress)

Sorry to have kept you ________ for such a long time.

用所给动词的适当形式填空：

(follow, listen, give, play, come, go, be, build, wait, set, dress)

In ________ conditions, a bad thing can lead to good results.