下列加大生态保护和建设力度的措施不恰当的是( )。

A．在过牧地区实行退牧、封地育草，实施草场“三化”治理工程

B．加快小流域治理，减少水土流失

C．推进岩溶地区石漠化综合治理

D．继续建设“三北”防护林，加速营造松林和杨树林

If I were on the spot that day, I should be able to prevent the disaster to happen.

A. I should be able to prevent the disaster from happening.
B. I should have prevented the disaster to happen.
C. I would have been able to prevent the disaster from happening.
D. I would be able to prevent the disaster to be happened.