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

Does it（）much to have the bicycle repaired

A. pay
B. spend
C. cost
D. ask

单项选择题

The number of the students who can attend this course（）fifteen.

A. have
B. has
C. are
D. is

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