用所给单词的正确形式填空。

1. I spent some time              (have) sports every day. I think it's a good way to keep healthy.

2. — How far is it from our school to the farm?

    — It is about two              (hour) walk.

3. As a student, we should listen to our teachers _______ (care) in class.

4. — Where are the twins?

    — They have             (go) to the library. They want to borrow some books.

5. Everyone knows that the harder we study, the _______ (much) knowledge we can get.

6. Mrs. Mort invented a memory robot to make it _______ (work) for her husband because he had a very

    bad memory.

7. They were              (watch) TV at home when their mother came back last night.

8. Wang Nan plays ping-pong very well. She is one of the most famous _______ (play) in the world.

9. — Mum, there's a waste bag on the ground.

    — Oh, dear! It shouldn't be              (throw) out. Please pick it up and put it into the dustbin.

10. It was cold yesterday. My mother came to the school and _______ (bring) me some clothes.