根据墙的位移情况和墙后土体所处的应力状态，土压力可分为（）、（）、（）。
参考答案：静止土压力、主动土压力、被动土压力
He ______ trees in his garden just now. [ ]
A. was seen planting
B. was seen plant
C. is seen to plant
D. has been seen to plant
代理席位
