By the end of last week,600 people from 50 countries to attend the meet

题干

By the end of last week,600 people from 50 countries to attend the meeting，with nearly half coming from the United States，Germany and Britain.

A．had registered	B．have registered
C．registered	D．were registered

上一题下一题 0.85难度单项选择更新时间:2017-07-04 12:05:30

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