— What were you up to when your parents came in?

— I ____ for a while and ____ some reading.

A．was playing； was going to do

B．played； did

C．had played； was going to do

D．had played； did

我国的可再生能源规模大、分布集中，需要（）。

A.集中开发

B.规模外送

C.大范围消纳

D.智能化调配