yáng;hào;姮;cuō;yì;瞬。
With the world _____ fast, we have something new to deal with all by ourselves every day.
A.change
B.changed
C.tochange
D.changing
A.I= ,从上向下
B.I= ,从上向下
C.I= ,从下向上
D.I= ,从下向上