单项选择题

During the summer vacation, Mary worked on a (an) _________ basis as a salesman, taking 8 percent of everything she sells.

A．salary
B．income
C．commission
D．pension
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单项选择题
Do you regret paying fifty dollars for the dog No, I would gladly pay _________ for him.
A．as much twice
B．twice so much
C．much twice
D．twice as much
单项选择题
The critics thought the acting was generally poor. I didn't find _________ .
A．it
B．it so
C．it to be too
D．it was too
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