单项选择题

The idea of traveling through _______ space to other planets interests many people today.

A．a.
B．the
C．\
D．one
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_______ both sides accept the agreement _______ a lasting peace be established in this region.
A．Only if, will
B．if only, would
C．Should, will
D．Unless, would
单项选择题
I have always thought _______ of Michael.
A．highly
B．doubtfully
C．greatly
D．nervously
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