区域保税的报核期限是( )。
A．每季度一次B．每半年一次C．每两月一次D．每年一次
参考答案：B
Not unti his fellows criticized him _______ to admit his mistake.
A．does he begin
B．did he begin
C．began he
D．had he begun
在金融市场上，利率的高低主要由社会平均利润率和资金供求关系决定。 ( )
