单项选择题

Don't touch that wire. It's ______.

A．living
B．alive
C．live
D．lively
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单项选择题
How many ______ known altogether
A．species of fishes are
B．species of fish is
C．specieses of fish are
D．species of fish are
单项选择题
The sun is shining in the sky and sending out ______ light and heat.
A．a large number of
B．a great many
C．a large amount of
D．a lot
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