用所给的正确形式填空。 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.