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单项选择题

He is rich,______ he isn't happy.

A．but
B．so
C．or
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热门试题

单项选择题We needn't go to school ______ Sundays.

A．from
B．on
C．in

单项选择题— ______ the man —It's my father.

A．Who's
B．Whose
C．What's