单项选择题

With the development of modern science and technology, a manned trip to Mars should be _________.

A．potential
B．thoughtful
C．feasible
D．certificated
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单项选择题
I can put up with his _________ any longer.
A．personality
B．character
C．nature
D．temper
单项选择题
A．chanceB．timeC．momentD．occasion
A．chance
B．time
C．moment
D．occasion
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