单项选择题

Betty isn't quite __________ Alice.

A．more careful than
B．less careful as
C．as careful as
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单项选择题
There is __________ O and __________ U in the word hour .
A．a...a
B．a...an
C．an...a
单项选择题
My father isn't __________ as he was last week.
A．busier
B．so busier
C．so busy
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