动词填空。用括号内所给动词的适当形式填空。

1. ______ (not quarrel) with each other again. It just makes the problem more serious.

2. I was told when I was young that Shanghai _______ (lie) in the east of China.

3. Children are often told not to listen to music while they _______ (do) their homework.

4. We were advised that we _______ through the forests with a map and umbrellas. (walk).

5. We must do as much as we can _______ ( protect ) the environment.

6. — Where were you last night? 

    — I was in the library. I _______ some information on the Internet. (search)

7. More and more robots controlled by computers _______ (use) to do difficult work in many

    dangerous places in the future.

8. I like old things. This is the second time I _______ (see) the exhibition at the history museum.

9. All the people _______ (make) to leave their finger printers that night.

10. — Mr. White used to work in Beijing before he came to Wuxi. 

      — Yes. He _______ (teach) English there for nearly ten years.