单项选择题

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

A. invented
B. discovered
C. found
D. developed
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单项选择题
All the students in this class passed the English exam ______ the exception of Wang Ming.
A. on
B. in
C. for
D. with
单项选择题
______ leaves the. classroom should tell me.
A. Anyone
B. None
C. Whoever
D. Everyone
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