单项选择题

The people for the experiment were chosen completely ______.

A．at length
B．in essence
C．at random
D．in bulk
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单项选择题
The two newspapers gave different ______ of what happened.
A．versions
B．editions
C．productions
D．texts
单项选择题
A new baby and a new job can be equally ______.
A．tremendous
B．intensive
C．demanding
D．overwhelming
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