单项选择题

It is essential that you ______ competitive prices.

A．quoting
B．quote
C．making
D．make
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单项选择题
We are pleased to make you firm offers ______ both Groundnuts and Walnutmeat CFR Copenhagen.
A．for
B．to
C．in
D．with
单项选择题
In case Customs duties are short-levied or not levied on import or export, the Customs may, within ______ after the date of payment of Customs duties or the date of release of the goods, recover the amount of Customs duties short-levied or not levied.
A．six months
B．one year
C．two years
D．four years
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