单项选择题

A．Once a week.
B．Twice a week.
C．Three times a week.
D．Four times a week.
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单项选择题
Jane had been______ in the country and was quite content in her new life.
A．risen
B．aroused
C．raised
D．arisen
单项选择题
It's ten years since the scientist ______on his life's work of discovering the valuable chemical element.
A．made for
B．set out
C．took off
D．turned up
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