Вживайте артиклі, або присвійні займенники де потрібно: 1. He will go on ... business to Italy either in March or April this year.
2. Not long ago he went on ... business trip to France.
3. I got ... impression he is still on ... vacation.
4. I hesitated to contact you when you were on ... holiday trip.
5. During ... business trip he finalized ... Contract.
6. They issued ... visa for ... trip last week.
7. The repairs started when everybody was on ... holiday.
8. ... Bill of Lading generally includes information about the shipped goods.

My dear friend! Many people many times felt just the same as you do right now, I'm not an exception. This is a widespread problem of bad self confidence. And this problem is solvable! If your friends think you're a snob, then go ahead, make them think differently. Walk into the classroom and smile to your classmates, say hello to everyone. It's scary only for the first time. And don't worry about their reaction, they're just surprised. If you're still too shy to do that at once, then do it another way: go to an after school activity. That can be sports, music, drama, anything you choose will fit. There you'll get to know different people, it will be easier make the first impression, just because they don't know you and they won't judge you by the things you did before, like the classmates can. 
So, here I finish my letter. I hope, those advices can help you.
Always yours *имя*

1. We decided to postpone _the_ party for _a_ week.
2. It was _an_ ugly house with too many passages and _a_ glass porch.
3. Peter is _a_ friend of mine.
4. They tried to break _the_ lock with _a_ sledgehammer.
5. __ kings live in __ palaces.
6. An educated man is not happy without __ books.
7. _The_ palm trees along the beach are very tall.
8. Sorry if _the_ truth hurts.
9. From the window she had _an_ enthralling view of the city.
10. I won’t forget you in _a_ hurry.
11. He recognized her at __ first sight.
12. When we last played __ golf you were terrible.
13. She works as _a_ chemist.
14. _The_ sun was getting warmer.
15. We went to _the_ cinema last night.
16. I like ___ ice-cream.
17. He repeated it over and over again until he knew it by heart.
18. Here is _the_ book I told you about.
19. In front of _the_ station there was _an_ elm tree.
20. It was very hot for _the_ time of year.