单项选择题

If you try to pass ______ the problems, it would be impossible for you to make any progress in this field.

A．off
B．by
C．over
D．across
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单项选择题
If either of you had been able to hold ______ your anger, the fight would have been avoided.
A．back
B．for
C．in
D．against
单项选择题
She was running ______ balance, with her feet wrongly positioned.
A．on
B．in
C．off
D．over
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