I (keep) the books for three weeks,so I have to renew them this afternoon.
我们应该思考如何把中国文化介绍给全世界.
We should think about how to Chinese culture the world.
That is his old house. He lived there for twenty years. (合并为一句)
That is his old house he lived for twenty hours.
His mother will come back ____. (对划线部分提问)
will his mother come back?
Chinese doctors saved many patients all over the world. (改为被动语态)
Many patients all over the world by Chinese doctors.
David can hardly speak Chinese. (改为反意疑问句)
David can hardly speak Chinese, ?