单项选择题

We managed to reach the top of the mountain, and half an hour later we began to______ .

A．ascend
B．descend
C．decline
D．plunge
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单项选择题
I am_______ of his methods which he spent two months researching; they seem not very scientific to me.
A．sturdy
B．skeptical
C．indefinite
D．hysterical
单项选择题
She is only the_______ chairman, the real work is done by somebody else.
A．nominal
B．notorious
C．nutrient
D．negligible
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