1. It’s dangerous for animals to drink if the water become p        ．
  2. Some animals are g         and friendly to people．
  3. This is a babital that has never been d          by people.
  4. The nose of the elephant is about two meters l               .

A. enough big        
B. too big                
C. big enough

[     ]

A. worse
B. worst
C. bad
D. badly

A. a
B. an
C. some

[     ]

A. a two-month
B. a two-months
C. two months
D. two-month's

A. interested
B. interesting
C. interest
D. interests

1. A: The lazy boy usually doesn't go to school on time.
    B: The lazy boy is usually ________  ________ school.
2. A: I find that it is hard to get along well with all my classmates.
    B: I find _________  _________ to get along well with all my classmates.
3. A: This question is difficult enough for me to answer in such a short time.
    B: This question is ________ difficult ________ I can't answer it in such a short time.
4. A: Mike is 17 years old and Kate is 15 years old.
    B: Kate is two years ________  ________ Mike.
5. A: Xiaogan has changed a lot in the past few years.
    B: Great changes have ________  ________ in Xiaogan in the past few years.
6. A: Mr Smith came to China six years ago.
    B: Mr Smith ________  ________ in China for six years.

A. math
B. difficult
C. physical
D. physics

A. health
B. healthy
C. healthier
D. healthiest