单项选择题


A．what
B．which
C．that
D．/
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单项选择题
A．regularlyB．irregularlyC．regularD．irregular
A．regularly
B．irregularly
C．regular
D．irregular
单项选择题
According to the context, our alertness refers to ______.
A．marriage celebration
B．Valentine's Day
C．dinner party
D．romantic custom
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