ответить на вопросы 2,7,9,10 и 11

2. In the middle of the 20th century there were few computers in the world because they were enourmous in size and occupied large rooms.

7. The main disadvantages of computers are that they are complicated and get out of date too fast. Besides, there is a problem of compatibility.

9.  Computers help to browse the Internet, type and print out texts, search and sort data. We also use them to watch films, listen to music and play games.

10. Computers can be harmful for our health. People spending too much time at the computer often suffer from such conditions as headaches, fatigue, blurred or double vision, loss of focus, and head and neck pain...

11. Yes, it can. Most often people use them for work, education and entertainment, but sometimes computers are used to commit crimes, such as hacking and cracking, identity theft, fraud, theft, cyberbullying, etc.