单项选择题

Science is still largely ignorant ______ the causes of many kinds of cancer.

A．about
B．of
C．with
D．to
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单项选择题
Before 1920s, American women were deprived ______ the right to vote to a large extent.
A．of
B．to
C．from
D．with
单项选择题
The sad story about the little girl and her sick parents ______ all of us.
A．influenced
B．affected
C．touched
D．effected
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