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
Without the help of people from every corner of the world, people in Wenchuan County, Sichuan Province ______ recovered very quickly from the May twelfth Earthquake.()

A. must not have
B. couldn’t have
C. may not have
D. can’t have
单项选择题
These examples show that all individuals, they are rich or poor, should be responsible ______ they are involved in law.()

A. if;when
B. if; as long as
C. whether; as long as
D. whether; since
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