2012年公共英语五级词汇巩固练习十七
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21. When carbon is added to iron in proper ________ the result is steel. A) rates B) thicknesses C) proportions D) densities 22. You should try to ________ your ambition and be more realistic. A) reserve B) restrain C) retain D) replace 23. Nancy is only a sort of ________ of her husband‘s opinion and has no ideas of her own. A) sample B) reproduction C) shadow D) echo 24. Now that spring is here， you can _____ these fur coats till you need them again next winter. A) put over B) put away C) put off D) put down 25. There is a ________ of impatience in the tone of his voice. A) hint B) notion C) dot D) phrase
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