单项选择题

______ you are allowed to go abroad is still a question.

A．If
B．Whether
C．Weather
D．That
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单项选择题
The temperature in Guangzhou is much higher than ______ in Beijing in November.
A．that
B．which
C．what
D．it
单项选择题
We have to produce more food to ______ the demand of the ever-growing population.
A．suit
B．fix
C．meet
D．respond
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