Как правильно написать a elf или an elf

Скорее всего что правильно так an elf 

1. A humanoid robot is a robot with its body shape built to resemble the human body.

2. Pepper moves around with wheels and it has various sensors around its foot area, which prevent collisions with the surroundings.

3. The little robots assist in exercise sessions and help children overcome their fears of surgery, sometimes going to the theatre with them.

4. In restaurants, you can use the Pepper Robot, they will interact with customers, take orders and offer pies. The Pepper Robot can be used to work on board the liner. The robot will greet guests on board and help them navigate. Also, the Pepper robot can be used in "seminars" where people interested in insurance and for advertising purposes are invited.

5. I would like a robot like Pepper because he would help around the house and help people in their work. They would fulfill and use our latent desire. The elderly will need a robot most of all, because if they have a robot like Pepper next to them, they will not feel lonely.

Объяснение: Если ответ лучший, почему бы не отметить его лучшим?

1. The sun has not risen yet, but the sky in the east is getting lighter every minute.

2. I saw you walking along the street the other day with a heavy bag.

3. I have not read the newspaper today.

4. It is very late, and trams have stopped running: we must find a taxi to get home.

5. How many times have you been to St. Petersburg?

6. At last I have trans­lated this article: now I shall have a little rest.

7. We went to the country yesterday, but the rain spoilt all the pleasure.

8. My watch was going in the morning, but now it has stopped.

9. The lecture has not begun yet and the students are talk­ing in the classroom.

10. She has just gone out.

11. She left the room a moment ago.

12. We have not solved the problem yet.

13. When did it all happen?

14. The morning was cold and rainy, but since ten o'clock the weather has changed and now the sun is shining brightly.

15. Show me the dress which you have made.

16. Oh, how dark it is! A large black cloud has covered the sky. I think it will start raining in a few minutes.

17. Oh, close the window! Look, all my papers have fallen on the floor because of the wind.

18. When did you open the window? — I opened it ten minutes ago

Удачи в учёбе!)