If anyone happens to drop in while I am out, _________ him or her leave a message.

Science and technology have in important ways __________ the improvement of agricultural production.

He is very sick. I insist that a doctor __________ immediately.

George loves pop music very much but _____ classical music．

Although money is important, not many people ______ the idea that money can bring happiness and health．

The kind old lady offered to ________the poor homeless stranger.

After the former manager returned from abroad, our company _________and the production doubled.

The manager has _______ to improve the working condition in the company.

Not knowing where to go or what to do, I ______ across the streets aimlessly .

I know that smoking is a bad habit, but I can’t ______ myself of the feeling that I need to smoke.