题目内容
On that day,Dr. Martin Luther King ________,but we didn't know who ________ him.
A. killed;was killed B. killed;killed
C. was killed;was killed D. was killed;killed
D 【解析】句意:在那天马丁·路德金被杀死了,但是我们不知道谁杀死了他。根据we didn't know可知,kill这个动作发生在过去,第一个句子的主语Dr. Martin Luther King与kill之间是被动关系,所以应该用一般过去时的被动语态,其谓语动词是was或were+过去分词,故排除AB;第二个句子who是宾语从句的主语,who与kill之间是主动关系,动作发生在过去,所以...
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