单项选择题

（）I don't know much about internet, I find it is really useful.

A．As
B．Since
C．If
D．While

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单项选择题

—I'm sorry. I'm late. —（）, Lin.

A．You're welcome.
B．Go ahead.
C．Don't mention it.
D．No problem.

单项选择题

In（）novel Little Princess, Little Princess is（）brave girl.

A．a；the
B．the；a
C．the；the
D．a；a

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