About two years ________ since the earthquake took place in Wenchuan.

A．passed

B． has passed

C．have passed

D．has been passed

房屋查勘鉴定的分类有( )。

A．日常查勘鉴定

B．定期查勘鉴定

C．季节性查勘鉴定

D．工程查勘鉴定