--What do you want to do next?We have half an hour until the baseball game.

----_____.Whatever you want to do is fine with me.

A．It just depend

B．It’s up to you

C．All right

D．Glad to hear you

工业制造金刚砂(SiC)的化学方程式如下：SiO₂＋3C===SiC＋2CO↑.在这个氧化还原反应中，氧化剂和还原剂的物质的量之比是 [ ]

A．3∶5  

B．1∶2

C．2∶1  

D．1∶1