As a NES, but not a teacher, I might advise:
1. I was interviewed by XYZ comapany
2. You are from Delhi, but you go to the UK very often.
3. If you are willing, call me on my UK number.
4. Do you meet people
5. You go to Delhi and when you reach Delhi, can you say Delhi has come? - Not unless Delhi actually moves in the process!
6. Could you help me prepare for my presentation on Friday ?
7. This will not interfere with my work. I promise you that.
8. I have lined up some people for the interview, so I am busy.
9. The initial form of the butterfly is known as caterpillar.
10. You were on call waiting when I tried to call you.
11. What is the difference between a pub and a bar?
12. This is the colour red or this is the red colour[ed scarf]. I would use the first phrase when meaning the actual colour red, but the second when referring to something that was coloured red..
13. I spoke to you the other night. Can we say the other night like the other day? Yes.
14. You look like a traffic cone. What do we mean by that? Orange and white horizontal bands?
15. What is the meaning of maids of honour list ?
See: maid of honour - definition of maid of honour by the Free Online Dictionary, Thesaurus and Encyclopedia.
maid of honour (n)
1. US and Canadian the principal unmarried attendant of a bride Compare bridesmaid, matron of honour
2. (Cookery) Brit a small tart with an almond-flavoured filling
3. an unmarried lady attending a queen or princess
16. There's a tree on the way. Depends on the context - "on the way" or "in the way"
17. What is the difference between cottage and house ?
See: cottage: - definition of cottage: by the Free Online Dictionary, Thesaurus and Encyclopedia.
1. A small, single-storied house, especially in the country.
2. A small vacation house.
Hope this helps