单项选择题

We must get to the root of the problem.

A．approach
B．cause
C．heart
D．solution
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单项选择题
This latest injury must surely mean that her tennis career is now at an end.
A．over
B．ready
C．rewarding
D．promising
单项选择题
The idea was quite brilliant.
A．positive
B．clever
C．key
D．original
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