单句改错。下列句子每句均有一处错误,请指出并改正。He came here for the purpose ofdo business.
A B C
错误项_______改正_________I will give money tomedicine research.
A B C
错误项_______改正_________He could be run for exercise.
A B C
错误项_______改正_________Not only you but also he knowthe secret.
A B C
错误项_______改正______ Beijing is one of the big cities in China.
A B C
错误项_______改正_________