—By       local farmers, we hope        them improve their lives.—I think it’s a good idea. 

Many students are          about football． They          play a game whenever possible．  

You can't imagine that a well－behaved gentleman ________ be so rude to a lady.

— Li Fan won the first prize in the national physics competition. — I ________ he was the winner.

What do you mean, there are only ten tickets? There _________ be twelve.