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16.The high cost of raw materials is keeping pricesup.

分析 原材料的高成本使价格上涨.

解答 答案是 up,考查固定搭配.根据句意"原材料的高成本使价格上涨"keep sth up是固定搭配,意思是:保持,继续,维持,所以答案填up.

点评 所谓固定结构是指英语中一些不能随意更改的习惯表达.如固定短语中的词不能缺,固定搭配要前后一致等,对于涉及英语固定短语,固定结构的题目,只能是靠着平时的准确积累和记忆来做对题目.

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