[题目]Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases．A．not handled B．not being handledC．not to be handled D．not having been handled 题目和参考答案——青夏教育精英家教网—

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【题目】Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases．

A．not handled B．not being handled

C．not to be handled D．not having been handled

【答案】A

【解析】

试题分析：考查if条件句省略。在if条件句中，如果谓语动词是“be”或含有“be”，而主语又和主句的主语一致或者主语是“it”时，从句中的主语可连同动词“be”一起省去，形成if＋形容词/分词/名词/代词/副词的结构，本题从句补充完整应是if it is not handled ……,可省略it is。句意：专家警告医院的药物垃圾如不妥善处理，也会导致疾病传染。故选A

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