human knowledge has greatly_in the last 30 years,which enables people to achieve more and live more comfortablely.A.risen B.increased C.expanded D.widen求详解!
问题描述：
human knowledge has greatly_in the last 30 years,which enables people to achieve more and live more comfortablely.A.risen B.increased C.expanded D.widen求详解!
答
C.
答
C.expanded 是对的.
A.risen 用于位置或数量方面的上升；
B.increased 用于数量方面的增加
D.widen 用于大小或范围变宽