介词填空。

1. His family is like a tall tree _____ long roots.

2. Most, _____ Robert, can hardly speak any Chinese.

3. They drink _____ the village well and go _____ walks _____ the countryside.

4. The leaders strongly believe _____ the program.

土地估价必须考虑（）的影响。

A．政府土地政策

B．当地的经济状况

C．土地四周环境

D．人为因素