小明问老师：“为什么说战国时期是我国封建社会的开端？”老师说：“因为____。” [ ]

A．使用铁器和牛耕

B．封建土地私有制的形成

C．土地国有制在全国瓦解 

D．各国进行了政治改革

________cleaning the yard and making up the beds for the  old, we also read newspapers for them

and had chats with them. [ ]

A. Except for 

B. Rather than    

C. Apart from  

D. Instead of