单项选择题

They are trying to identify what is wrong with the present system.（）

A．prove
B．discover
C．consider
D．imagine

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单项选择题
Some comments are just inviting trouble.（）

A．keeping out of
B．getting into
C．asking for
D．suffering from
单项选择题
My principal concern is to get the job done fast.（）

A．serious
B．deep
C．main
D．particular
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