单项选择题

There is "O" and "U" in the word "hour".

A．a, a
B．a, an
C．an, a

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单项选择题

Wang Dong jumps ______ in his class.

A．High
B．most high
C．the highest

单项选择题

______ in the same class.

A．I and Lucy is
B．Lucy and I are
C．Lucy and I am

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