Ten years had passed      the CCTV event People Who Moved China took place in 2002.  [ ]

A. when            

B. while        

C. before          

D. since

在国际货物集装箱运输中，装箱单是记载每个集装箱货物相关资料以及向海关申报的必要单据，它的英文缩写是( )。

A．CLP

B．P/L

C．B/L

D．P/I