请根据以上叙述，总结出引起少年儿童肥胖的主要原因：____。

⑴How do you go to school?____                            A、It's next to the hospital.

⑵What does she do?____                                        B、I get up at 7:20.

⑶Where is the cinema, please?____                        C、Because I can plant trees.

⑷When do you get up?____                                    D、Ten Yuan.

⑸Why do you like spring?____                                E、I go to school on foot.

⑹How much is the book?____                                 F、He likes dancing.

⑺What are you going to do tomorrow?____          G、She is a doctor.

⑻What's your hobby?____                                       H、I like reading books.

⑼What does Mike like?____                                     I、No, there isn't.

⑽Is there a cinema near here?____                          J、I'm going to go hiking.

填补下列名句的空缺处或按要求填空。