A. busier / us
B. busier / we
C. more busy / us
D. more busy / we
2. Jane is ________ than Betty.
A. less taller
B. less tallest
C. less tall
D. not as tall
3. China is ________ country in the world.
A. the third largest
B. the largest third
C. the third large
D. a third largest
4. -Which is ____ season in Beijing?
-I think it's autumn.
A.good
B.better
C.best
D.the best
5．- Which is__________ , the sun, the moon or the earth?
-- Of course, the moon is.
A.small
B.smaller
C.smallest
D.the smallest
6.The air in Beijing is getting much _____ now than a few years ago.
A. clean
B. cleaner
C. cleanest
D. the cleanest
7. Mobile phones are very popular now and they are _____ than before.
A. cheap
B. cheaper
C. cheapest
D. the cheapest
8．I study English as_______as my brother.
A.hard
B. harder
C. hardest
9. Which is _____ , a bicycle or a computer?
A. expensive
B.more expensive
C.the most expensive
10. The Yellow River is one of ______rivers in China.
A long
B longer
C the longest
11.She is the second _______student in our class.
A. tall
B. taller
C. tallest