问题
选择题
year after year , tigers are becoming fewer and fewer .
A．Having been killed
B．Killing
C．Killed
D．Having killed
答案
答案：C
考察非谓语动词.一年又一年的捕杀,老虎变得越来越少.过去分词表示被动的,发生过的动作,其逻辑宾语为句子主语.故选C.
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