单项选择题

I think you can take a (n) ______ course to improve your lecturing skills.

A．intermediate
B．middle
C．medium
D．mid
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单项选择题
Some diseases are ______ by certain water animals.
A．transplanted
B．transformed
C．transported
D．transmitted
单项选择题
The Industrial Revolution ______ in the invention of the steam engine.
A．originated
B．stemmed
C．derived
D．descended
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