19. Many students think maths is　　　 　　　　　　(important) of all the sciences.

18. It seems that Li Lei is a little　 　　　　　　(tall) than Wu Dong. But Wu Dong looks much　　　 　　　(strong).

17. The Yellow River is not so　　 　　(long) as the Changjiang River. It is the second　　 　　

(long) river in China.

16. Which country has　　 　　　(large) population, America or Japan?

15. If you want to be　　　 　　(healthy) than before, you must eat　　 　　　(little) and take more exercise.

14. This is one of the　　 　　　　(big) libraries in our city.

13. The student felt quite　　　 　　　(pleasure) when he passed the exam.

12. Please show me the　　　 　　　(near) way to the post office.

11. She is always as　 　　　(busy) as a bee.

10. This thick dictionary is much　 　　　　　(useful) than that thin one.