单项选择题

He hopes he can visit the United Nations building while he ____________ in New York next summer.

A．has been
B．is
C．will be
D．shall be
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单项选择题
Canada is larger than ____________ country in Asia.
A．any
B．any other
C．other
D．another
单项选择题
I'd ____________ the operation unless it is absolutely necessary.
A．rather not have
B．rather not to have
C．not rather had
D．rather not having
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