Make up sentences: 1. this/since/film/i/ a child/ naven't/ i/ was/ seen 2. have/ many/ scientists/ things/ explored/ since/ began/ the spase era 3. since/ hasn't/ it/ stopped/ yesterday/ raining

1. I haven't seen this film simce I was a child.
2. Scientists have explored many things since the space era began.
3. It hasn't stopped raining since yesterday.

1. Who are you making coffee for? - I am making coffee to(for) me.

  -Coffee? - I am making coffee to(for) me. I like drinking coffee in the morning.

2. Is he taking a shower now? - Yes, he always takes a shower after work.

3. What is she doing now? - She is packing her suitcase. Tomorrow in the morning she is going to Londom.

4. Who is this car belonged to? - It is belong to my neighbor, he always leaves it near our office.

5. She is very nervous now. - Yes, she is. She is waiting for a call of her friend. - вкажіть сами, бо ви скоротили і тому незрозуміло від кого вона чекає виклику.

6. You always interrupt me. (Можна, як варіант You are always interrupting me, як що хочете вказите, що ПРЯМО завжди перебиваєш).

7. It seems to me, that our bussines is getting better.

8. Why don't you taste (можна try) sause? - Does it taste badly?

9. It seems, that you are in hurry. - Yeah, I have a driving lection in 15.

10. How many does the box weight? - I don't know. I am scaling it at the moment.

11. He is working too much now. - Hmm, I don't think so. He always find time to relax( or get a rest(relax)).

12. Why doesn't Bob drink juice? - He hates tomato juice.

13. Do you want to tell me something? - Yes, I find this party very cool. (або ж I like this party too much, проте раджу перший варіант, він кращий)

14. What do you mean? I don't (can't) understand you.

15. Hanna isn't very careful during these days.

1. Чтобы уменьшить токовые потери в электрических проводах, увеличивают напряжение и ток пропорционально уменьшается.
Инфинитив- To reduce.
2. Проводники, предназначенные для передачи электрической энергии поездам- это третий рельс либо подвесной провод. Инфинитив- to be.
Не следует переводить "используются", т.к. в этом случае должно быть просто used, а не to be used.
3. Для перевода железной дороги на электрическую тягу, необходима дорогостоящая реконструкция.
Другой вариант: Чтобы перевести железную дорогу на электрическую тягу, нужны дорогостоящие работы по реконструкции. 
Инфинитив- To convert.