单项选择题

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

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

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单项选择题
The none of students in the class likes the mistress, who is used to being ______ of everything they do.
A．emotional
B．optimistic
C．interested
D．critical
单项选择题
The destruction of the Twin Towers in New York City （）shock and anger not only throughout America but also throughout the whole world.

A. enveloped
B. summoned
C. tempted
D. provoked
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