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

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 handledD. not having been handled

【解析】

试题分析：根据句意：医疗垃圾如果不正确处理，将会传播疾病。这里其实是if 从句的省略形式。It it was not handled properly, 当主从句的主语一致的时候，可以省略从句的主语和be动词，被动语态省略了系动词和主语就是过去分词的形式。所以选A。

考点: 考查省略句

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1. ________
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