单项选择题

Every day Mother spends two hours ______ housework.

A．to do
B．doing
C．does
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单项选择题
There is something wrong with my eyes, I can't ______ things clearly.
A．see
B．smell
C．hear
单项选择题
Jack's brother isn't so ______ as Jack.
A．tall
B．taller
C．tallest
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