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20．The Chinese people are kind and caring．If not，I _____ in China in the past 30years．（　�。�
A．didn't stayB．hadn't stayed
C．couldn't stayD．couldn't have stayed

分析 中國人民善良有愛心．如果不是這樣，在過去的30年我不可能呆在中國．

解答 答案是D．本題考查虛擬語氣；題干中If not完整的表達是"If the Chinese people were not kind and caring"，是與現在事實相反的虛擬條件，主句中的"in the past 30 years"說明的是與過去事實相反的結果；與過去事實相反的結果主句中動詞用"would/should/could/might+have done"，故選D．

點評 在掌握虛擬語氣的規(guī)則的基礎上，判斷題干屬于什么類型的虛擬，然后根據語境，選用恰當的動詞形式表達虛擬．

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