How high are the mountains in the region？（）

A．It’s a new way of applying chemical fertilizer.
B．It’s an improved method of harvesting crops.
C．It’s a creative technique for saving labor.
D．It’s a fainting process limiting the use of ploughs.

A．He picked up some apples in his yard.
B．He cut some branches off the apple tree.
C．He quarreled with his neighbor over the fence.
D．He cleaned up all the garbage in the woman’s yard.