单项选择题

Will you tell me which key is the one ______ the mailbox

A．of
B．to
C．for
D．on
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单项选择题
Fat her meant him ______ into business, but he chose to study medicine.
A．going
B．to have gone
C．to go
D．having gone
单项选择题
Well-mannered children have usually been properly ______ up by their parents.
A．raised
B．put
C．brought
D．rose
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