题目内容


——_________ abroad for 10 years, he went back home.
A．Working B．Having workedC．To work D．Worked
B
考查现在分词的完成时做状语，因为他是现在国外工作了10年，才回家的，在状语的动作和主句的动作有明显的先后关系，用Having worked，选B。
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