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
______ is well known, light, like heat, is a form of energy.
A．It
B．What
C．Just as
D．As
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单项选择题
Scarcely ______ such an exciting movie.
A．have I ever seen
B．I have ever seen
C．saw I
D．I saw
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