来自陈之瑞的问题
【____weallknowis____theoldladythoughsheisveryrichstillworkseveryday．A．As;thatB．What;thatC．It;whatD．That;why】
____weallknowis____theoldladythoughsheisveryrichstillworkseveryday．
A．As;that B．What;that C．It;what D．That;why
