单项选择题


A．to
B．at
C．for
D．with
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单项选择题
A．whichB．thatC．whatD．where
A．which
B．that
C．what
D．where
单项选择题
Little progress can be made in the present economic ________ in this underdeveloped country.
A．mood
B．air
C．climate
D．fashion
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