My friends have different hobbies. Lily has a beautiful voice. Singing has become (she) favorite hobby. She sings Karaoke and (watch) many music videos every day and she often sings at friends' (party). John can swim very (good). He usually swims in the river near his house. And he practices swimming in a swimming pool Sundays. He wants (be) a swimmer at Olympics one day. Many people are (interest) in flying model planes. Bobby is one of them. He thinks is fun and relaxing. He flies model planes with his friends in the park every weekend. But now, he is busy every day he is going to be in the(three) year of middle school. Can he still keep flying model planes as a hobby?