中BC21-22形副比最测试
1. tall比较级：
A. taller
B. tallr
C. tallier
2. big比较级：
A. biger
B. bigger
C. biggest
3. easy比较级：
A. easyer
B. easier
C. easily
4. fine比较级：
A. finely
B. finer
C. fineer
5. delicious比较级：
A. deliciouser
B. more delicious
C. very delicious
6. narrow比较级：
A. narrower
B. narrowwer
C. narrowest
7. fast最高级：
A. faster
B. fast
C. fastest
8. beautiful 最高级：
A. beautifulest
B. more beautiful
C. most beautiful
9. thin 最高级：
A. thinest
B. thinnest
C. most thinest
10. expensive 最高级 ：
A. many expensive
B. much expensive
C. most expensive