1. it is difficult to learn english
2. learning english is difficult
3. it was wonderful to see our friend
4. it is useless to complain about that matter
5. it was uncomfortable to sit in one place for so long
6. it will be lots of fun to go to that party next week
7. it is almost impossible to find example
8. it will be very interesting to travel to bach long island by boat
9. it is very difficult to understand that book
10. it is not easy to write good compositions in english
11. it is tired to drive from lang son home
12. it is not very convenient to get to school by bus
13. it is very important to protect the environment
14. it is hard to finish this work tonight
15. it is not easy to drive a car
16. it is easy for her to pass the final exam
17. it is comfortable to fly to nha trang
18. it is very dangerous to let your baby go out alone
III.
a. it is lovely to see u again
b. i am delight to receive your message
c. they are well prepared to attend the olympia contest
d. we are happy to receive a lot of presents from our grandparents
c. she is smart enough to answer all the questions
IV.
ko bt bạn êy