Those farmers who _________ move from place to place with their animals in the past have moved into new houses at last.

I insisted that the boy          his hands before having supper.

It was so dark that he ______.

The policeman        have fined me for speeding but finally，he let me go.

She searched all the places where she _____ have left her necklace but it was all in vain.

Everyone _____ make mistakes．So you needn’t care about it that much．

--- The research is difficult. Who do you think can do the job?
---       my students have a try?

How _____ you say that you have made great progress since there are so many mistakes in your test paper ?

If I had taken part in the 400-meter relay race in the sports-meet, our class _____ the race．I’m _____ weight this year．

—What will you do next Sunday?
—Maybe do some shopping, for I ______go to school on Sunday．