2005年10月12日至10月17日，神舟六号载人航天飞行圆满成功。标志着我国在发展载人航天技术方面取得了又一个具有里程碑意义的重大胜利。执行此次航天飞行任务的航天员是：

A．the list of taxes seems endless
B．they would rather spend their time and energy elsewhere
C．they find their knowledge about taxes is so limited that they are unable to write tax report all by themselves
D．paying experts to prepare their tax report and asking for tax advice have become very popular

A．collected for social progress
B．that increases with each passing year
C．that is collected from those who earn most
D．that varies according to how much money a person earns