单项选择题

A．They are in the same department.
B．They went to the same school.
C．They are both doctors.
D．They are both chemists.
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单项选择题
A．He uses a newer machine.B．His job is now done by a machine.C．He went on strike.D．His job was given to another worker.
A．He uses a newer machine.
B．His job is now done by a machine.
C．He went on strike.
D．His job was given to another worker.
单项选择题
A．There is not enough oxygen.B．We are short of grain.C．Air and water are abundant.D．Forests are beautiful.
A．There is not enough oxygen.
B．We are short of grain.
C．Air and water are abundant.
D．Forests are beautiful.
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