全部题目用英文作答（翻译题除外），并将答案写在答题纸相应位置上，否则不计分。
SECTION 1  VOCABULARY(30 points)

I. Directions: Match the words in Column A with their definitions in Column B. Write the letter of the answer to each word in Column A on your ANSWER SHEET.(10 points, 1 point for each)
   A              B
1. challenge      A. making dirty or impure
2. inaccessible   B. against reason or common sense
3. surge          C. forward movement like powerful waves
4.diverse         D. greatness of size or importance
5. foul           E. of different kinds
6. emerge         F. rock in a very hot liquid state
7. heed           G. question the lawfulness or rightness of
8. absurd         H. give attention to
9.lava            I. that cannot be reached
10. magnitude     J. come into existence

II. Directions: Read each of the following sentences carefully, and choose A,B,C or D that has the closest meaning to the underlined word or phrase. Blacken the corresponding letter of the answer on your ANSWER SHEET.(10 points, 1 point for each)

11. Through the passing millennia, thousands of animal species have come and gone.
A. arrived and left
B. appeared and escaped
C. come into existence and become extinct
D. approached and disappeared

12. Occasional loss of livestock must be weighed against the good these animals do in maintaining the balance of nature.
A. estimated by            B. balanced by
C. copied in terms of      D. compared in terms of value of

13. Recognizing the growing threat HIV/AIDS poses to child survival, the Agency will support efforts for a solution.
A. affects           B. takes to
C. increases         D. points to

14. Pesticides have also taken their toll.
A. threatened their lives      B. destroyed their habitat
C. played their part           D. caused deaths

15. With each departure a small part of the diversity of nature that makes life so interesting is also gone.
A. going away        B. extinction
C. changing          D. disaster

16. Several months later a similar feat was performed by the first American astronaut to walk in space.
A. ordinary task     B. noteworthy achievement
C. common deed       D. something done

17. On the earth, our atmosphere diffuses light so that, when the sun is up, light seems to be everywhere.