15. － Which do you like 　　? － I prefer this one.　 A. well　 B. best　 C. good　 D. better

14. When I walked past his house, I heard him 　　　in the room. A. sung　 B. sang　 C. sings　 D. singing

13. Our city is beautiful. There are a lot of trees on 　　　　side of the streets.

A. both　 B. all　 C. either　 D. neither

12. Please have a wash 　　　　you go to bed.　 A. after　 B. before　　 C. while　 D. as soon as

11. More than two 　　　　years ago, people knew little about the universe.

A. thousands　 B. thousand　　 C. thousand of　 D. thousands of

10. Mother is ill. We'd better 　　　a doctor. A. send away　 B. send to　 C. ask for　 D. send for

9. Our knowledge of computers　　　 　growing all the time. A. be　 B. is　 C. are　 D. were

8. － Grandma, let me help you.　 － It's really nice　　　 you. A. for　 B. to　 C. of　 D. off

7. Study hard,　　　 you'll fall behind the others. A. and　 B. but　 C. or　 D. though

6. People usually 　　　　"hello" to each other when they make a phone call.

A. say　 B. speak　 C. tell　 D. talk