一项资产可以充当货币的必备条件是（）？
A.它是法偿货币
B.它是普遍可接受的
C.它以黄金做后盾
D.它具有内在价值
参考答案：B
He goes there __ than I .
A．often
B．more oftener
C．more often
D．as often as
