China has _____ area of about 9,600,000 square kilometers, including Diaoyu Island(钓鱼岛) .

A．a                B．an               C．the              D．/

Some people won’t realize the importance of their health _____they have lost it.

A．after             B．when             C．until              D．as

—Listen！Helen is singing in the next room.

—It _____be Helen .She has gone to Beijing.

A．should            B．mustn’t          C．may              D．can’t

—How long have you _____the novel?

—Three days.

A．kept             B．borrow           C．been             D．bought

You look quite tired. You’d better _____a good rest.

A．stop to have       B．stop having        C．to stop to have     D．to stop having

—What do you think of tomorrow’s football match?

—_____difficult for us_____ the match.

A．We’re, to win     B． We’re, winning   C．It’s, to win        D．It’s, winning

With the help of the Internet, information can _____every corner of the world quickly.

A．reach            B．get               C．arrive            D．go

Many accidents_____ by careless drivers last year. 

A．are caused        B．were caused       C．have caused       D．will cause

If there ______no buying and selling of animals, there ______no killing in nature.

A．is, will be          B．will be, will be      C．is, is              D．will be, is

In the past ten years, our hometown named Yandu（盐都） _____a lot.

A． changes          B．changed           C．was changing       D．has changed