一、Vocabulary and Structure（10 points,1 point for each item）從下列各句四個選項中選出一個最佳答案，并在答題卡上將相應(yīng)的字母涂黑。

1.Experts have found that normal sleep can be divided into five______stages.
A.moderate
B.initial
C.distinct
D.advanced
答案：C

2.The student_____described the beautiful mountains and rivers in his home town.
A.artificially
B.vividly
C.critically
D.viciously
答案：B

3.What her grandfather said left a_____impression on her mind.She still remembers
it.
A.final
B.vague
C.deep
D.main
答案：C

4.By the end of next year the bridge _____.
A.is to complete
B.has been completed
C.will be completing
D.will have been completed
答案：D

5.We have greatly _____the procedure according to the chairmans suggestion.
A.stimulated
B.perceived
C.obscured
D.simplified
答案：D