单项选择题

In ______century, computers will be used more widely.

A．twenty-one
B．the twenty-one
C．twenty-fast
D．the twenty-first
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单项选择题
In no way ______from practice.
A．theory can be separated
B．theory is separated
C．can theory be separated
D．has theory been separated
单项选择题
He is ______a horse.
A．stronger as
B．as stronger than
C．the strong as
D．stronger than
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