ответьте на во к тексту.
1. When did the primitive lamp disappear?
2. What was in fact the first searchlight?
3. Who was the first to discover the electric arc?
4. Why did his discovery remain unknown in the West?
5. What was the subject of Yablochkov's report to the Paris Academy in 1876?
6. Who made the first successful incandescent lamp?
7. Can you explain the difference between his lamp and Edison's one?
8. What kind of filament is used nowadays?
9. What achievement was based on the research of S. Vavilov?
10. What are advantages of the artificial daylight lamps?

1. David goes to the concerts every weekends.

David is going to the concert this weekend.

2. She often plays chess at home.

She is playing chess at home now.

3.  I cook fish every day.

I'm cooking fish now.

4.  -

The Pattisons are watching TV now.

5. Victoria studies English at university.

Victoria is studying English at university now.

6. We often read books about animals.

We are reading a book about animals.

7. Nick like to listen rock music.

Nick is listening rock music now.

8. Carry usually gets up at 8 o'clock.

Carry is getting up now.

Susan: Luke, what time (1) _do_ you get up?
Luke: About eleven o'clock. I usually (2) ___go___ to bed at three or four in the morning because I (3) ___work in the evenings and I (4) ___don't___ finish until about 12 o'clock at night.
Susan: And when do you (5) _get up___ ?
Luke: Well, I (6) ___have___ two cups of black coffee at 11.30 in the morning and I (7) __have 'lunch' at about two o'clock. I eat in restaurants (8) __a_ lot. I work from Wednesday to Saturday but I (9) __don't__ work on Sunday or Monday and I often (10) __sleep___ all day on Sunday!