单项选择题

The examination has been cancelled. You ______ all that review, after all.

A．didn't need to do
B．needn't do
C．needn't have done
D．needn't to do
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单项选择题
The plays of Eugene O'Neill, characterized by their unsettling questions and tumultuous struggles with fate, transformed the American theater.
A．thrilling
B．troubling
C．refreshing
D．frightening
单项选择题
The ______ friend was exposed in the end to be hidden rival who had been plotting against the company's marketing in Hong Kong.
A．professed
B．announced
C．exclaimed
D．declared
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