单项选择题

We were told that we should follow the main road______ we reached the central railway station.

A．whenever
B．until
C．while
D．wherever
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单项选择题
We don't doubt ______ he can do a good job.
A．whether
B．that
C．how
D．why
单项选择题
Maybe you have been to many countries, but nowhere else ______ such a beautiful palace.
A．can you find
B．you could find
C．you can find
D．could you find
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