单项选择题

Now Helen works ______ than before.

A． more careful
B． more carefuller
C． more carefully
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单项选择题
We are doing much better ______ English ______ our teachers help.
A． at, in
B． with, with
C． in, with
单项选择题
Lucy is ______ English girl.
A． a
B． an
C． the
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