Change the forms of the following sentences. 句型转换。
1. There are some people in the park.(改为一般疑问句)
                                                                                                    
2. My mother will go to work in the morning.(对划线部分进行提问)
                                                                                                         
3. I think you are right.(改为否定句) 
                                                                                                       
4. Lynn isn't old enough to go to school.(同义句转换)
                                                                                                        
5. It is about nine thousand kilometres from Canada to China.(对划线部分进行提问)