5. Traveling/ airplane/ expensive than/ traveling by train/. .......................................................................................................................................... 6. My father/ like/ travel/ summer/. .......................................................................................................................................... 7/ Pupils/ interested/ listen/ teachers telling/ funny story/ English class. …….………………........................................................................................................... 8/.This book/ cheap/ that one. ….………………………………………………………………………………………. 9. How / you/ go /school/ everyday? …………………………………………………………………………………………. 10. Viet Nam/ have/ a lot / tropical forests/. ............................................................................................................................................ 11. My little brother/ often/ watch television/ when he/ finish/ homework/. ............................................................................................................................................ 12. What/ longest river/ Viet Nam/? ........................................................................................................................................... 13. What/ you/ usually/ do/ recess? …………………………………………………………………………………………… 14. We/ often/ do/ experiments/ Physics class. …………………………………………………………………………………………… 15. How far/ it/ from/ your house/ school? …………………………………………………………………………………………….