Question

The harm the modern farming methods have done        the countryside is considerable.

A．on

B．at

C．to

D．for

Answer 1

C

考查短语：do harm to 对什么有危害，句意：现代农耕的方法对乡村的危害是值得考虑的。The harm为先行词，the modern farming methods have done to是定语从句，中间省略了关系代词that/which,故选c。