试题答案与详细解析
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选择题

参考答案： B    

答案解析： disappear

1、 The old concerns lose importance and some of them vanish altogether. A.developB.disappearC.lingerD.renew

参考答案： A    

答案解析： stage

2、 In the United States educational system, intermediate school is the transitional phase between the primary grades and high school. A.stageB.notionC.patternD.alternative

参考答案： C    

答案解析： inhibits

3、 Fluoride deters tooth decay by reducing the growth of bacteria that destroy tooth enamel. A.facilitatesB.overwhelmsC.inhibitsD.loosens

参考答案： C    

答案解析： china

4、 The firm of Bonnin and Morris in Philadelphia was probably the first American company to manufacture porcelain. A.silverwareB.crystalC.chinaD.linen

参考答案： D    

答案解析： before

5、 Gunpowder was used extensively in firearms prior to 1890. A.inB.aroundC.fromD.before

参考答案： C    

答案解析： past

6、 We packed up the things I had accumulated over the last years and left for good. A.closeB.nearC.pastD.final

参考答案： C    

答案解析： deadly

7、 The chemical is lethal to rats but safe to cattle. A.toxicB.harmfulC.deadlyD.contagious

参考答案： B    

答案解析： careful

8、 She is very conscientious about her work. A.worriedB.carefulC.anxiousD.nervous

参考答案： A    

答案解析： strengthened

9、 She has consolidated her power. A.strengthenedB.wonC.hardenedD.united

参考答案： B    

答案解析： polluted

10、 The drinking water is contaminated with impurities. A.blackenedB.pollutedC.darkenedD.mixed

参考答案： C    

答案解析： describes

11、 Her novel depicts a futuristic America. A.writesB.sketchesC.describesD.indicates

参考答案： D    

答案解析： danger

12、 He expressed concern that the ship might be in distress. A.despairB.difficultiesC.needD.danger

参考答案： A    

答案解析： trying

13、 They are endeavoring to change society as a whole. A.tryingB.workingC.doing D.making

参考答案： B    

答案解析： everlasting

14、 Your eternal boasting annoys everyone. A.unchangeableB.everlastingC.boringD.monotonous

参考答案： D    

答案解析： showed

15、 The other women seemed contented and they even exhibited their bellies with pride. A.demonstratedB.uncoveredC.spreadD.showed

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