单项选择题

Our investigation ______ the inefficiency of your management.

A．showed out
B．showed through
C．showed off
D．showed up
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单项选择题
I don't think it advisable that Mark ______ to the research work since he has no practical experience in this field.
A．should be assigned
B．will be assigned
C．had been assigned
D．was assigned
单项选择题
The young girl ______ never being able to walk again.
A．resigned herself to
B．resigned to
C．resigned herself as
D．resigned as
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