单项选择题

— Have you ever been to______ United States
— No, but I have been to______ England.

A．the, the
B．/,/
C．the,/
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单项选择题
You can work out the problem ______ .
A．happy
B．easily
C．easy
单项选择题
Can you tell me______ .the time is
A．what
B．how many
C．how long
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