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14．-Oh dear!Look at the mountains of trash in the street and the terrible haze these days!
-Everyone's effort counts．I ______ fireworks on New Year's Eve!（　�。�
A．needn't have playedB．mustn't have played
C．shouldn't have playedD．couldn't have played

分析 -哦，親愛的！看看街上的垃圾和這些天可怕的陰霾!
-每個人的努力都是重要的．我本不應該在除夕放煙火的！

解答 答案為C．shouldn't+have+done表示本來不應該做某事，而實際做了．含有指責對方或自責的含意．再結合句意我本不應該在除夕放煙火的！可知答案，故選C．

點評 情態(tài)動詞+have+done是歷年高考的重點和難點之一，一定要理解結構與用法．
needn't+have+done則表示"本來不需要做某事而做了"．I needn't have bought so much wine-only five people came．我本來沒有必要買這么多酒，只來了五個人．
must+have+done表示對過去事情的肯定推測，譯成"一定做過某事"，該結構只用于肯定句．
It must have rained last night，for the ground is wet．昨晚一定下雨了，因為地面還是濕的．
shouldn't+have+done表示本來不應該做某事，而實際做了．含有指責對方或自責的含意．
Look，Tom is crying．I shouldn't have been so harsh on him．看，湯姆哭了，我本來不應該對他如此嚴厲．
could have done 表示"過去本能夠做某事卻未做．"
couldn't have done 沒有虛擬語氣的用法，表否定推測，"不可能做過某事"

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