单项选择题

I can see you have put a lot of time（）it.

A．into
B．on
C．with
D．under

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单项选择题
汉译英：“信用证；订货单”，正确的翻译为：（）

A．credit；purchase orler
B．customs declaration form；purchase order
C．customs declaration form；proforma invoice
D. credit; proforma invoice
单项选择题
I'd like（）something about your foreign trade policy.

A．knowing
B．known
C．to know
D．to knowing
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