— Shall I help you get a dictionary since I'll drop in at the bookstore this afternoon?

—         . [ ]

A.  It couldn't be better

B.  Of course you can

C.  If you like  

D.  It's up to you

税收产生的经济条件是（）。

A.剩余产品的出现

B.公共需要的出现

C.私有制的存在

D.国家公共权力建立