单项选择题

______ metal ran out of the furnace.

A．Molten
B．Graded
C．Welded
D．Consolidated

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单项选择题

Eventually the rarer genes will disappear and the genetic types, ______ leaving fewer offspring will become.

A．extinguished
B．extraordinary
C．extinct
D．extreme

单项选择题

The severance of church and state is a basic principle of our government.

A．integration
B．discrimination
C．separation
D．exposition

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