单项选择题
He used to get up late, （）
A. did not he
B. did he
C. didn't he
D. use he
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单项选择题
The business of doctors is to prevent and（）disease.
A. kill
B. cure
C. wound
D. injure
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单项选择题
______, the new medicine is now in mass production.
A. With the solved problem
B. With this problem being solved
C. With the problem solved
D. With this problem to solve
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