单项选择题

Many scientists remain （）about the value of this research program.

A．sceptical
B．stationary
C．spacious
D．specific

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单项选择题
Just because I'm （）to him, my boss thinks he can order me around without showing me any respect.

A．redundant
B．trivial
C．versatile
D．subordinate
单项选择题
We should （）our energy and youth to the development of our country.

A．dedicate
B．cater
C．ascribe
D．cling
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