--What do you think of maths?

--My favourite. It’s        for me to study of all the subjects in school.

A．more difficult

B．the most difficult

C．less difficult

D．theleast difficult

下列应视同销售缴纳消费税的情况有( )。

A．将外购已税消费品继续加工成应税消费品

B．将委托加工收回的应税消费品继续加工成应税消费品

C．自制应税消费品继续加工成应税消费品

D．自制应税消费品用于向外单位投资