Помогите с грамматикой по английскому. Хотел текст напрямую закинуть, но он нормально не вставляется. Сделайте хотя бы часть, очень прошу.

3.Russian computer specialists ... to develop new means of communication at present.

b) are trying 

4.Turn off the TV-set, please. I ... it.

a) do not watch 

5.What... Kate now? She’s speaking over the phone.

a) is, doing b) does, do c)are doing НЕ ЗНАЮ

6.I couldn’t call you back at that moment, I ... English on the Internet.

a) practiced 

7.When we entered the room, the students ... sms messages,

a) didn’t read b) wasn’t reading c) were not reading НЕ ЗНАЮ

8.They ... their new goods, when 1 switched on my TV-set. 

a) advertised СКОРЕЕ ВСЕГО, НО ТОЧНО НЕ ЗНАЮ

9. While the teacher was explaining how to arrange financial in­formation, the students ... ring tones.

a)was downloading b) downloading c)were downloading НЕ ЗНАЮ

10.What... you yesterday at 3? — I was trying to connect to our

company computer.

a) did, do СКОРЕЕ ВСЕГО, НО ТОЧНО НЕ ЗНАЮ

1.b
2.b
3.b
4.a
5.c
6.c
7.c
8.c
9.a
10.c
11.b
12.b
13.c
14. c
15. b
16. a
17.a