单项选择题

A．He visited the big tower he saw on TV.
B．He has visited the TV tower twice.
C．He has visited the TV tower once.
D．He will visit the TV tower in June.
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单项选择题
A．Dean Williams.B．Professor Brown.C．An assistant dean.D．A student.
A．Dean Williams.
B．Professor Brown.
C．An assistant dean.
D．A student.
单项选择题
A．Two.B．Three.C．Four.D．Five.
A．Two.
B．Three.
C．Four.
D．Five.
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