海关多征的税款，海关发现后应当立即退还；纳税义务人自缴纳税款之日起( )内，可以向海关申请退还。
A．6个月
B．一年
C．18个月
D．两年
参考答案：B
— Could you tell me _________?
— Sure. Reading aloud may help you.
A．where I can improve my spoken English
B．when I can improve my spoken English
C．who can help to improve my spoken English
D．how I can improve my spoken English
Rivets are usually made of（）.
A.wrought-iron
B.aluminum
C.high-tensile steel
D.mild steel
