单项选择题

--How did the boss pay the workers
--As a rule, they were paid ______.

A．by an hour
B．by the hour
C．by hour
D．by hours
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单项选择题
______ is the only animal that can speak.
A．Man
B．A man
C．The man
D．Man
单项选择题
The pupils ,said ______ was against their teacher.
A．what were you doings
B．what you were doing
C．what are you doings
D．what were you doing
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