1. a , faster, train, is, than, bus, a
                                                                       
2. go, I, Tuesday, on, home
                                                                       
3. airport, we, may, the, to, go 
                                                                       
4. arrive, airport, the, at, we, do, when 
                                                                        
5. I, may, to, go, Beijing, a, on, plane