单项选择题

（）the punishment was unfair, he accepted it without complaint.

A．Since
B．While
C．As long as
D．Even though

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I could have called you yesterday, but I（）your telephone number.

A．didn't have
B．hadn't had
C．won't have
D．wouldn't have
单项选择题
He was so engaged（）his business that he hadn't been home for a month.

A．at
B．on
C．for
D．in
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