单项选择题

As a salesman, he works on a (an)______basis, taking 10% of everything he sells.

A．income
B．commission
C．salary
D．pension
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单项选择题
There are nations whose lack of contact with the outside world has______ poverty.
A．fallen into
B．consisted in
C．resulted in
D．come up to
单项选择题
Although Asian countries are generally more ______in social customs than Western countries, there have been several notable examples of women leaders in both China and India.
A．conservative
B．confidential
C．comprehensive
D．consistent
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