---- Could you play ________ basketball when you were a primary school student?

---- No, I couldn't, but I could play ________ violin.

A．the; an

B．/; the

C．a, an

D．the; /

江苏一些大型化工企业选择建立在远离城市的长江下游沿岸，下述理由错误的是（　　）

A．化工厂需要大量的水

B．便于向长江内大量排放污水

C．便于原材料和产品的运输

D．减少化工厂生产过程中“三废”对人口稠密地区的危害