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选择题
- 1、 The old concerns lose importance and some of them vanish altogether.
- 2、 In the United States educational system, intermediate school is the transitional phase between the primary grades and high school.
- 3、 Fluoride deters tooth decay by reducing the growth of bacteria that destroy tooth enamel.
- 4、 The firm of Bonnin and Morris in Philadelphia was probably the first American company to manufacture porcelain.
- 5、 Gunpowder was used extensively in firearms prior to 1890.
- 6、 We packed up the things I had accumulated over the last years and left for good.
- 7、 The chemical is lethal to rats but safe to cattle.
- 8、 She is very conscientious about her work.
- 9、 She has consolidated her power.
- 10、 The drinking water is contaminated with impurities.
- 11、 Her novel depicts a futuristic America.
- 12、 He expressed concern that the ship might be in distress.
- 13、 They are endeavoring to change society as a whole.
- 14、 Your eternal boasting annoys everyone.
- 15、 The other women seemed contented and they even exhibited their bellies with pride.
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