单项选择题

It is well known that Tomas Edison ______ the electric lamp.

A．discovered
B．developed
C．found
D．invented
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单项选择题
______ the monitor has given you, Tom!
A．How good an advice
B．What good advice
C．What a good advice
D．How good advice
单项选择题
The chairman suggested that she ______ a few minutes before the meeting began.
A．will arrive
B．arrive
C．would arrive
D．may arrive
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