句型转换,根据句子后面的要求，变换句型。(10分)
⑴ They go to Beijing by train. (对划线部分提问)
                                                         
⑵ Can I go to Xi’an by bike?（作否定回答）
                                                         
⑶ This is a book.（变为复数）
                                                         
⑷ He is going to the bookstore this afternoon. （对划线部分提问）
                                                         
⑸ There is a hospital near the school.(变一般疑问句)