1. He'll inform you of his decision next week.
2. I've got a new problem, the screen of my computer has frozen.
3. Yesterday I downloaded a lot of popular songs from the Net.
4. At last, they discovered a lonely island covered with unusual plants.
5. A human brain is a very complex organ.
6. Have you tried to change the anti-virus program on your computer?
7. Ability to sell is very important for this job.
8. People will never be able to obey the nature.
3 a do play
b in
3 a does cook
b on
4 a do watch
b at
5 a does ...
b on
6 a does listen
b in
1) is
2) are / amn’t
3) is
4) Is / is
5) Are
6) are /aren’t /is
7) is
8) are /are
9) were /were / was / was
10) weren’t
11) were
12) will