— How about going hiking this weekend?

— Sorry, I prefer       rather than      .

A．to stay at home; go out

B．to go out; stay at home

C．staying at home; go out

D．going out; stay at home

按下列要求书写化学方程式：

（1）镁在氧气中燃烧______；

（2）高温时碳还原氧化铜______；

（3）用稀盐酸清洗铁制品表面的铁锈______．