单项选择题

A．moreover
B．otherwise
C．therefore
D．however
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单项选择题
A．forB．byC．withD．in
A．for
B．by
C．with
D．in
单项选择题
A．Five lessons.B．Three lessons.C．Twelve lessons.D．Fifteen lessons.
A．Five lessons.
B．Three lessons.
C．Twelve lessons.
D．Fifteen lessons.
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