一个物体从离地面80m高的地方做自由下落运动．求

（1）物体接触地面前一瞬间的速度

（2）落地前最后1s内的位移．

They are all interested in the newly-built apartments along the river,        really want to buy them yet.

A．none of them

B．neither of them

C．none of whom

D．neither of whom