11. It's very tired to drive from home to Lang Son.
12. It's not very convenient to get to school by bus.
13. It's very important to protect the environment from pollution.
14. It's hard for me to finish this work tonight.
15. It's not easy to drive a car.
16. It's easy for her to pass the final exam.
17. It's comfortable to fly to Nha trang.
18. It's very dangerous to let your baby go out alone.
