The twins have studied in this school .
The little girl put her things on the floor.(改为一般疑问句)
the little girl her things on the floor?
The boss in this factory made the wordkers work for 12 hours a day in the past.(改为被动语态)
The workers in this factory made work for 12 hours a day in the past.
John asked"Can you care for my pet cat while I'm away?"(改写句子,句意不变)
John asked I care for his pet cat while he was away.
We can become good learners by asking the teachers for help.(对划线部分提问)
you become good learners?
It's very useful information.(改为感叹句)
the information is!