单项选择题

A．would
B．could
C．should
D．might
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单项选择题
A．reasonB．doubtC．wayD．problem
A．reason
B．doubt
C．way
D．problem
单项选择题
A．announcedB．eminentC．establishedD．indispensable
A．announced
B．eminent
C．established
D．indispensable
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