V.
1. I write to tell you how much I enjoyed there
2. Those few hours which I spent with you and your family last week made me very happy
3. I have been England since the beginning of October
4. But this is my first invitation to dinner with an English family
5. I found out the conversation most interesting and I was glad to practice my English.
6. I also like to congratulate you on your excellent cooking.
7. I am grateful for the helpful information which you gave me
8. I hope to find a suitable school in the next few days.
9. Will you please give my best wishes to your parents?
10. I am looking forward to seeing you next week
VI.
1. I would like to visit London than any other countries in the world.
2. The boy spends three hours a/per day learning English lessons
3. We are all looking forward to making a  trip to Singapore next week
4. It is essential to meet your aunt at the station at 5 p.m
5. It was such a good film that  they decided to go to see it again