---Can Li Hua help me with my English?

---I regret to tell you her English is ______ yours.

A．as good as

B．no more than

C．no better than

D．as much as

分离下列各组物质一定会用到过滤操作的是（　　）

A．水和汽油

B．蔗糖和水

C．氧气和氮气

D．氯酸钾和二氧化锰