发布时间：2016-12-20 来源：环球网校 发布人：wyznl
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.