---My uncle goes to climb Mount Tai every year.

---Oh, really? He __________ climbing mountains.

A．used to hate

B．is used to hating

C．used to hating

D．is used to hate

水电厂按径流调节的程度分，（）水电厂和（）水电厂。

A、无调节

B、有调节

C、日调节

D、季调节