单项选择题

The first textbooks ____________ for teaching English as a foreign language came out in the 16th can- tury.

A．having written
B．to be written
C．being written
D．written
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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
单项选择题
Canada is larger than ____________ country in Asia.
A．any
B．any other
C．other
D．another
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