单项选择题

The experiment turned ______ to be a total failure.

A．in
B．out
C．on
D．over
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单项选择题
Her short stories are enjoyed by adults and children ______.
A．like
B．alike
C．together
D．all
单项选择题
I don't think it's so hard to him of the fact.
A．believe
B．urge
C．agree
D．convince
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