检验检疫证单中标记及号码栏的填写要求是：按货物实际运输包装的标记填写，没有标记的填写( )。

A．“NO”

B．“N/N”

C．“N/M”

D．“/”

The soldier was wounded,________he pushed on.   [ ]

A. for          

B. and          

C. so            

D. yet