单项选择题

Are you still ______ that the climbers can be rescued

A．enthusiastic
B．optimistic
C．pessimistic
D．domestic
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单项选择题
Research shows that pupils who are good at math tend to be more conformist and ______ than other pupils.
A．obscure
B．obvious
C．obedient
D．objective
单项选择题
I believe his whole argument is based on a false ______.
A．paradox
B．junction
C．dilemma
D．premise
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