By the end of last week 611 people from 49 countries( )to attend the meeting,with nearly
问题描述：
By the end of last week 611 people from 49 countries( )to attend the meeting,with nearly
half coming from Germany.A.had registered.B.have registered.C.registered.D.were registered为什么选A不选B?
答
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.