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.