单项选择题


A．on
B．at
C．up
D．down
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单项选择题
She never laughed, ______ lose her temper.
A．or she ever did
B．or did she ever
C．nor did she ever
D．nor she ever did
单项选择题
Wang Hai sits ______ Ma Ling in our classroom.
A．in the front of
B．in front of
C．before
D．ahead
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