赞题库-背景图
单项选择题

A．but
B．however
C．so
D．while
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单项选择题A．whoB．whomC．whatD．which

A．who
B．whom
C．what
D．which

单项选择题A．whichB．thatC．whatD．

A．which
B．that
C．what
D．/