单项选择题

A body of volunteers ______ to aid the helpless in their struggle for survival.

A．have been organized
B．have organized
C．has been organized
D．are organized
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单项选择题
I invited Tom and Ann to dinner, but ______ of them came.
A．both
B．none
C．either
D．neither
单项选择题
It was my father' s wish in his will that I ______ become an engineer.
A．should
B．would
C．might
D．could
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