—Did you visit the famous cultural relics last month?

—No,we _________ it,but we spent too much time shopping.

A．could have visited

B．must have visited 

C．can’t have visited

D．shouldn’t have visited 

写出下列反应的化学方程式并括号中注明反应类型（“化合”、“分解”、“置换”）：

（1）铁丝在氧气中燃烧______________________，（_______反应）；

（2）用煅烧石灰石的方法烧制生石灰___________________，（_______反应）。