David is a great teammate. He knows well how to work with ________.

He made      clear that he would take part in the sports meeting.

There are two roads______ to the park along the river. You can take _____ of them.

I’d appreciate        if you could turn the radio down. I’m doing my homework.

— Did a letter come for me this morning?
— Yes. _____ came for you.

The companies are working together to create _____ they hope will be the best means of transport in the 21st century.

--- You often talk with your classmate on the telephone or mobile phone?
--- _____． I like using QQ．

In societies where social roles are determined, boys usually copy the behavior of their fathers, and girls usually also copy _____ of their mothers.

There were many people standing by, but _____ of them were willing to help the poor boy.

—Betty told me the last mountainous bike you preferred to yesterday was bought by John.
—Oh, my! How I regret that I didn’t buy ______.