By the end of last week 611 people from 49 countries( )to attend the meeting,with nearly
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时间：2024-08-17 10:32:55
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By the end of last week 611 people from 49 countries( )to attend the meeting,with nearly【专
【专家解说】：因为 By the end of last week 是过去的过去发生的事情，现在来陈述的话就只能用过去完成时。而B选项是现在完成时。
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