单项选择题

A．undoubtedly
B．undoubtful
C．doubtedly
D．doubtfully
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单项选择题
A．whatB．thatC．whichD．of
A．what
B．that
C．which
D．of
单项选择题
A．AlthoughB．ThoughC．HoweverD．In addition
A．Although
B．Though
C．However
D．In addition
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