单项选择题

In my opinion standards of workmanship have ______ over the past 20 years.

A．aggravated
B．diminished
C．deteriorated
D．eroded
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单项选择题
It’s no good ______ him. He is always indifferent towards others' matters.
A．to turn to
B．turning to
C．turn to
D．turned to
单项选择题
With one leg broken in that car accident, he cannot even walk, ______ run.
A．let alone
B．that's to say
C．not to speak
D．don’t mention it
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