含挥发油的饮片烘烤时温度不宜超过（）

A．二冬 

B．二术 

C．二母 

D．二活 

E．二枫藤

I feel it is you as well as your wife that   for your son’s bad performance at school.

A．are to blame

B．is to be blamed

C．are to be blamed

D．is to be blamed