词汇选项（第1～15题，每 题1分，共15分）
下面共有15个句子，每个句子中均有1个词或短语有底横线，请从每个句子后面所给的4个选项中选择1个与划线部分意义最相近的词或短语。
1. The old concerns lose importance and some of them vanish altogether.
A）develop B）disappear
C）linger D）renew
2. In the United States educational system, intermediate school is the transitional phase between the primary grades and high school.
A）stage B）notion
C）pattern D）alternative
3. Fluoride deters tooth decay by reducing the growth of bacteria that destroy tooth enamel.
A）facilitates B）overwhelms
C）inhibits D）loosens
4. The firm of Bonnin and Morris in Philadelphia was probably the first American company to manufacture porcelain.
A）silverware B）crystal
C）china D）linen
5. Gunpowder was used extensively in firearms prior to 1990.
A）in B）around
C）from D）before
6. We packed up the things I had accumulated over the last three years and left for good.
A）close B）near
C）past D）final
7. The chemical is lethal to rats but safe to cattle.
A）toxic B）harmful
C）deadly D）contagious
8. She is very conscientious about her work.
A）worried B）careful
C）anxious D）nervous
9. She has consolidated her power.
A）strengthened B）won
C）hardened D）united
10. The drinking water is contaminated with impurities.
A）blackened B）polluted
C）darkened D）mixed
11. Her novel depicts a futuristic America.
A）writes B）sketches
C）describes D）indicates
12. He expressed concern that the ship might be in distress.
A）despair B）difficulties
C）need D）danger
13. They are endeavoring to change society as a whole.
A）trying B）working
C）doing D）making
14. Your eternal boasting annoys everyone.
A）unchangeable B）everlasting
C）boring D）monotonous
15. The other women seemed contented and they even exhibited their bellies with pride.
A）demonstrated B）uncovered
C）spread D）showed
