— What about the monthly test? Is it easy?

— Yes, but I don't think ______ pass it.   [ ]

A. somebody  

B. anybody

C. nobody  

D. everybody

解决我国水资源空间分布不均的有效途径是（　　）

A．跨流域调水

B．兴修水库

C．防治水污染

D．人工降水