单项选择题

He did not go home ______ he finished the work.

A． if
B． because
C． until
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单项选择题
Please ______ page 54 and read Lesson Twelve.
A． turn to
B． turn on
C． turn into
单项选择题
Do you know ______
A． where does he live
B． where he lives
C． he lives where
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