单项选择题

—Are you done with the book I gave you
—Not quite. I've read all - the last unit.

A．until
B．since
C．just
D．but
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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
We' ve got to report ( )to the head office.
A．on
B．in
C．back
D．/
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