13. Look around while ______ the street.

　 　A. cross　 　　　　B. crossing　 C. crossed 　　　D. to cross

12. He lived in place __________ Gum Tree.

　　 A. called　　　　 B. name　　　　　 C. named　　　　 D. Both A and C

11. China is a _______country

A. developing　　 B. develop 　　　　C. developed 　　　D. being developed

9. Everyone knows Thomas Edison ________a lot of useful inventions.

　　 A. invents　　　　 B. invented　　　 C. discovers　　　 D. discovered　

(　 ) 10 We have decided ________a picnic in the bush this Sunday.

A. have　　　　　 B. to have　　　　 C. has　　　　　 D. had

8. About 5000 cars ________ in the factory last month.

　　 A. have produced　 B. were produced　 C. was produced　 D. will be produced

7. I won’t go ________ he comes back.

A. until　　　　　 B. while　　　　　　 C. when　　　　 D. why

6. When ______ the car ________?

　A. did, invent　 B. was, invented　 C. does, invent　 D. in, invented

5. The police found the lost car _______.

A. with mistake　 B. by accident　 C. by mistake　 　D. in accident

4. My mother told me that my homework must _______ on time.

　A. finish　 　B. be finish　 C. be finished　D. finished

3. Keys _______ used for ______ the doors.

A. is, opening　B. is, opened　 C. are, opening　 D. are opened