单项选择题

This is the reason ______ an airplane can't fly in space.

A． why
B． which
C． for that
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单项选择题
The lady always ______ in white at the party.
A． wears
B． dresses
C． gets dressed
单项选择题
I'm trying ______ to get this sentence right.
A． quite
B． well
C． hard
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