单项选择题

When Mr. Black retired, his son______the business.

A. took up
B. took over
C. took on
D. took out
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单项选择题
He never wrote to his father______ he was in need of money.
A. except
B. except when
C. except for
D. except that
单项选择题
I can hardly ______ the difference between these two words.
A. point
B. speak
C. talk
D. tell
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