单项选择题

The plant products have been carefully inspected and are considered to be ( ) from any quarantine pests.

A．out
B．away
C．free
D．far
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单项选择题
Yon should provide us a set of origin in( ),that is ,one original and two copies.
A．duplicate
B．quadruplicate
C．triplicate
D．double
单项选择题
The goods must be ( )in strong wooden cases.
A．packing
B．packed
C．shipped
D．shiooing
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