将甲、乙两物体自地面同时竖直上抛，甲的质量为m，初速度为v，乙的质量为3m，初速度为，若不计空气阻力，则 [ ]

A．甲比乙先到最高点

B．乙比甲先到最高点

C．落回地面时甲用时间是乙用时间的2倍

D．甲上升的最大高度是乙的2倍

—Millie, here is _____ bridge. What can you see across _____bridge?

—Oh, _____elephant is standing over there.

A．a, the, an

B．a, a, the

C．the, a, an

D．the, the, an