单项选择题

It is an irrevocable letter of credit which can not ( ).

A．change
B．be changed
C．changing
D．changed
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单项选择题
We decided to manufacture ______ capacity ______meet the demand. （）

A. to, to
B. on, and
C. with, /
D. for, while
单项选择题
汉译英：“产地检验证书；品质检验证书”，正确的翻译为：( )
A．Certificate of origin；Certificate of Fumigation
B．Certificate of fumigation；Certificate of Origin
C．Certificate Of quality；Certificate Of Origin
D．Certificate of Origin；Certificate Of Quality
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