Hello. I will be very grateful for your help.

Question

1)Which article is correct in the context: "The ambassador gave a/the(?)promise that his country would not interfere"?
2)Do you think it's possible to use "carry out" or "realise" with "visit", for example, "The premier carried out / realized an official visit to Zimbabwe"?
3)Which word is correct, cause or reason, (maybe, both?)in the context "Civilian deaths are the main cause of / reason for(?)tension between Nato and Afghan officials".
4)Do you think it's possible to say "after a year" in the sentence "They will leave the country after a year" or is it only "in a year"?
5)Is it possible to use the infinitive after "arrange", for example "they arranged to meet in Paris early next year"?
Thank you very much for your help.

Answer 1

1)Which article is correct in the context: "The ambassador gave a/the(?)promise that his country would not interfere"?
The article "a" is better, but even better than that is to rephrase the sentence: The ambassador promised that his country would not interfere.

2)Do you think it's possible to use "carry out" or "realise" with "visit", for example, "The premier carried out / realized an official visit to Zimbabwe"?
Better phrasing: The premier made an official visit...

3)Which word is correct, cause or reason, (maybe, both?)in the context "Civilian deaths are the main cause of / reason for(?)tension between Nato and Afghan officials".
Both work fine. I prefer "reason," but both are correct.

4)Do you think it's possible to say "after a year" in the sentence "They will leave the country after a year" or is it only "in a year"?
Both are correct.

5)Is it possible to use the infinitive after "arrange", for example "they arranged to meet in Paris early next year"?
Yes, that's correct.

Answer 2

1. a
2. "carried out" is much better
3. cause of
4. "in a year" means in the next 12 months, and is clearer. Otherwise it is not clear when the time counting starts.
5. yes, the infinitive use is perfect