单项选择题

You won't catch the train ______ you get up before 5 o'clock.

A． when
B． unless
C． if
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单项选择题
______ he failed in the maths exam again, ______he never gave up.
A． Because, so
B． Although, but
C． Although, /
单项选择题
— ______did you buy the new bag — Last Sunday together with my mother.
A． Where
B． When
C． Which
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