单项选择题

He said it was impossible for ______ a mistake in a computer's calculation, so you can rely on that.

A．there being
B．there would be
C．there to be
D．there was
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单项选择题
Speciation, ______, results when an animal population becomes isolated by some factor, usually geographic.
A．form biological species
B．biological species are formed
C．which forming biological species
D．the formation of biological species
单项选择题
True patriotism ______ putting the interests of one country above everything, ______ one's life.
A．consists of... containing
B．consists of... including
C．consists in... including
D．consists in... containing
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