Not only the students but also the teacher interested in this activity.

A．amB．isC．are

—Fruit juice can be to Children’s teeth.

—I agree with you. Children shouldn’t drink too much.

A．usefulB．deafC．harmful

—Forests are very important, aren’t they?

—Yes. They can prevent the water washing the earth away.

A．forB．toC．from

—I’ll return the book to Mary, but I can’t find her anywhere.

—She the teachers’ office. You can find her there.

A．have gone toB．has gone toC．has been to

we were quite tired, we still went on working.

A．Because; /B．Although; butC．Although; /

I’d like to walk to the park instead of there by bus.

A．goingB．goesC．to go

The doctor did everything they could the dying boy’s life, but they failed.

A．savingB．to saveC．saved

About one fifth of the world population Chinese. China is a country with population in the world.

A．is; a largestB．are; the largestC．is; the largest

—Have you finished your homework?

—Not . There are still some exercises to be done.

A．alreadyB．everC．yet

The table is too big and it almost half of the room.

A．takes awayB．takes offC．takes up