某家企业从法国进口一台模具加工机床，发票分别列明：设备价款CIF上海USD 600000，机器进口后的安装调试费为USD20 000．卖方佣金USD2 000，与设备配套使用的操作系统使用费USD80 000。该批货物经海关审定的成交价格应为( )。

A．USD702 000

B．USD682 000

C．USD680 000

D．USD662 000

The entrance exam is only fifteen days away from now. You will fail the exam ______ you study hard from

now on. [ ]

A. if

B. as soon as

C. unless

D. although