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 1890.
A. in
B. around
C . from
D. before
6.We packed up the things I had accumulated over the last 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
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