单项选择题

They all study hard but she studies the hardest ______ .

A．all
B．of all
C．in all
D．all in all
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单项选择题
Some people consider ______ cruel to send animals in rockets into space.
A．that is
B．it being
C．it be
D．it
单项选择题
It is urgent that a new president ______ for the university.
A．is elected
B．elected
C．will be elected
D．be elected
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