Correct these sentences.
e.g. I no like flying.____I don't like flying.____________
1 I can catch a bus to the airport?
2 You can smoke in the classroom.
3 She cans take a taxi to the station.
4 People can smoke in pubs in England?
5 The train don't go to Beijing.
6 How much costs a ticket?
7 I catch the bus always.