_____ more time， he’ll make a first-class tennis player sooner or later.

They were talking （ ） while preparing dinner.

The two companies decided to （ ） on a project concerning animal cloning.

As a Chinese proverb goes， a heavy snow _____ a good harvest year.

Please （ ） the water tap when you have finished your washing．

He learned how to use sign language to _____ with deaf customers.

（ ） relatively costly, the engine is highly efficient and needs servicing infrequently.

The travelers are going to Taiwan, （ ） they plan to stay for two or three days.

By this time next week, the winners _____ their awards.

It was while she was sleeping in her bedroom_____a thief broke into the house.

There is a lot of evidence（ ）too much stress is partly responsible for the disease．

Ten minutes _____ an hour when one is expecting a phone call.