6．Experts warn that medical waste from hospitals，if___ properly，may lead to spreading diseases．（　　）
A．not handledB．not being handled
C．not to be handledD．not having handled

分析 專(zhuān)家警告醫(yī)院的醫(yī)療垃圾如果處理不當(dāng)，有可能導(dǎo)致傳播疾病．

解答 答案：A
解析：if引導(dǎo)的條件狀語(yǔ)補(bǔ)充完整則是：if they are not handled properly．因?yàn)閺木涞闹髡Z(yǔ)與主句的主語(yǔ)一致且含有be動(dòng)詞，故可以將從句的主語(yǔ)與be動(dòng)詞一起省略，只保留其它部分．綜上，本題答案為A選項(xiàng)．

點(diǎn)評(píng) 本題考查省略句，做此類(lèi)題目時(shí)一定要仔細(xì)分析句子結(jié)構(gòu)，根據(jù)句意及語(yǔ)法等將句子還原為完整句子，再進(jìn)行省略．

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