单项选择题

( ) is generally accepted, L/C must be established 15 days before shipment.

A．It
B．As
C．That
D．What
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The seller ( ) accept our claims as tendered.
A．can but not
B．but cannot
C．cannot but
D．not but
单项选择题
We really appreciate it that you decided to ( ) the matter.
A．look into
B．look out
C．look after
D．look on
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