________ he has limited technical knowledge, the old worker has a lot of experience.

The farmers’ living conditions have improved _______ ever since the policy of supporting agriculture was introduced.

It is quite impossible that it will rain tomorrow. But if it __________, I would still go to school by bike.

We need a man full of wisdom to take charge of theproject–________ the young man graduating from Harvard havea try

I heard your grandpa used to be a teacher. — Yes. He was a Chinese teacher ______.