(一)根据下面的统计表回答：

俄罗斯能源生产构成

1975年与1960年相比，水力和核发电所提供的能源（）。

A．基本持平

B．大幅度上升

C．降低

D．不确定

I was surprised by his words ,which made me recognized ______silly mistakes I had made .

A．what

B．that

C．how

D．which