单项选择题

Representative samples ( ) taken by the inspector from the whole lot yesterday.

A．was
B．is
C．were
D．are
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单项选择题
( ) can be issued by the entry - exit inspection and quarantine authorities of the P.R. of China.
A．B/L
B．Certificate of Origin
C．L/C
D．Packing List
单项选择题
Portland is a city of ( ).
A．Poland
B．Australia
C．A
D．New Zealand
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