单项选择题

Because cows ______ meat and milk, they are valued in many countries.

A．both produce
B．both product
C．produce both
D．product both
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单项选择题
Excuse me, but it is time to have your temperature ______.
A．taking
B．to take
C．take
D．taken
单项选择题
He didn't pass the exam ______ that he hadn't studied hard.
A．on
B．×
C．in
D．up to
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