单项选择题

The profits rise was achieved ______ a backdrop of falling costs.

A．with
B．against
C．in
D．above
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单项选择题
Counsel for the defence submitted that his client was clearly
A．naive.
B．innocent.
C．simple.
D．liable.
单项选择题
Control of these emissions by adequate gas-cleaning processing is essential. The underlined part means
A．abundant.
B．sufficient.
C．accurate.
D．satisfactory.
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