单项选择题

As to the stem-cell research, the Bush Administration's attitude is one of ______.

A．skepticism.
B．disapproval.
C．ambivalence.
D．prudence.
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单项选择题
The word enervated in the first paragraph probably means ______.
A．weakened.
B．demolished.
C．vitalized.
D．enlivened.
单项选择题
The expression bracing themselves for the worst in the second paragraph probably means ______.
A．sneering at the impending difficulties
B．cheering themselves up for the worst situation.
C．preparing themselves for the worst situation.
D．having a total disregard for the coming difficulties.
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