1) For correct work the SOFTWARE should be updated.
2) When installing the SOFTWARE you should check whether it is compatible with your system.
3) The Operating system runs the SOFTWARE.
4) The Operating system manages the computer software and hardware.
5) Files with .rar or .zip extension should be unzipped.
<span>I thought that was very interesting to look at</span>
#11
1. had never seen
2. was playing
3. had locked
4. she had given
5. had enjoyed
6. liked
7. have not come
8. was
9. phoned
10. had not been
11. had arrived
12. would never speak
13. had just bought
14. would never drink
15. have already found
16. were asleep
17. were still discussing
18. have come
19. am
20. would be
#13
1. shine или shining (оба варианты верны)
2. will marry
3. put
4. was expensive
5. hadn't got
6. had destroyed
7. would find
8. had invited
9. has always been
10. had been waiting
11. would give
12. cannot
13. had happened
14. could
15. has broken
16. felt
17. was
18. was passing
19. would visit
20. were
1. Will you go with your family or your friends?
2. Where you did this het? (не нашёл перевода слова <em>het</em>, возможно, это какая-то ошибка, сделал по смыслу)
3. What you doing at 6 o'clock?
4. How many book you have read?
5. How long you does take to the center of the city to get it?
6. Have you written this letter?
7. Is she playing the piano now?
8. How do you want to celebrate this day?
P.s я бы ещё поставил <em>are</em> в предложениях 2,3,4 перед <em>you</em>, но в задании этих слов нет, так что лезть не стал.