单项选择题

By the time you arrive, I ______ working for two hours.

A．will be
B．can
C．will have been
D．have been
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单项选择题
As used in the last sentence, the phrase in short means （）

A．in the long run
B．in detail
C．in fact
D．in a word
单项选择题
（）the story how he lost his hearing.

A．Everyone knows
B．Edison himself liked to tell
C．No one knows
D．Edison himself disbelieved
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