单项选择题

"What are you busy ______ ""I am busy ______ the plan for the sports meeting."

A．in... to make
B．about... to make
C．in... making
D．about... making
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单项选择题
This is the second letter that he ______ his brother recently.
A．has got to
B．has heard of
C．has received from
D．has heard from
单项选择题
A young man cannot have ______.
A．experience of all world
B．experience of all the world
C．the experience of all the world
D．the experience of all world
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