单项选择题

John did not have to write the composition if he didn’t want to. It was ______.

A．imperative
B．optional
C．critical
D．unnecessary
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单项选择题
A narrow path______the stream to the other side of the park.
A．joins
B．crosses
C．unites
D．passes
单项选择题
I can’t understand how he can feel that his colleagues are always ready todenouncehim.(2003年中国人民大学考博试题)
A．compliment
B．criticize
C．flatter
D．challenge
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