单项选择题

A．however
B．therefore
C．whereas
D．but
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单项选择题
According to the Authority, which of the following must the house be built of sometimes
A．Stone.
B．Brick.
C．Cement.
D．Wood.
单项选择题
A．someB．anyC．noD．all
A．some
B．any
C．no
D．all
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