18. The Yellow River is the second ________ river in China.

　 A. long　　 B. longer　　 C. longest　　 D. the longest

17. Please run ________ the car. Maybe you can get the first medal.

　 A. so fast as　　 B. as faster as　　 C. as fast as　　 D. so fastest as

16. We still have ________ ride to go.

　 A. 4 hour’s　　 B. 4-hour　　 C. 4 hours’　　 D. 4 hour

15. I have a _______ sister.

　 A. 15-year-old　　 B. 15-years-old　　 C. 15 years old　 D. 15 year old

14. My sister is _________.

　 A. 15-year-old　　 B. 15-years-old　　 C. 15 years old　 D. 15 year old

13. Kate won the ______ race in the summer sports meeting.

　 A. 100-meter　 B. 100-meters　　 C. 100 meter　 D. 100-meter’s

12. I am hungry, and I’d like to have 5 _____ cakes.

　 A. other　　 B. others　　 C. another　　 D. more

11. I am hungry, and I’d like to have _____ 5 cakes.

　 A. other　　　 B. the others　　 C. another　 D. more

10. Twenty of us like swimming, _________ like shooting.

　 A. others　　 B. the others　　 C. other　　 D. the other

9. Study hard and you will _______ the others.

　 A. catch up　　　　 B. catch up with

　 C. come up with　　　 D. put up with