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20.The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can ___ all foods are secure to us,but we are sure that the situation is turning for the better.(  )
A.acknowledgeB.guaranteeC.identityD.clarify

分析 三鹿奶粉事件是一个说明食品安全是大问题的明显象征;没人能担保所有的食品对我们是安全的,但是我们能确定形势正在好转.

解答 答案:B.
三鹿奶粉事件暴露了食品安全的问题,因此可以推出应该是没有人能确保(guarantee)食品的绝对安全,所以选B.acknowledge承认;guarantee说明;identity身份;clarify澄清.

点评 本题考查了名词辨析.考生平时需多积累词汇,理解词义,并结合句意做出正确的判断.

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