Английский язык, времена

The list of the invitations is* ( Present Simple) rather long. 5. We are*( Present Simple) on-lookers of great scientific achievements such as television and a computer. 6. We can't imagine* ( Present Simple) our life without a notebook or a radio. 7. I'd like to speak* ( Present Simple) in details about computers.
8. What is* ( Present Simple) a computer?
9. A computer is an electronic device that stores*( Present Simple) information and allows* ( Present Simple) changes in it through the use of instructions. 10. A modern computer is* ( Present Simple) capable of doing various tasks, like word processing and accounting. 11. Personal computers are* ( Present Simple) widely used* but working on them requires some techniques.
12. A computer gives* ( Present Simple) a lot of advantages to a user. 13. The list of the advantages is rather long: computers give*( Present Simple) us access to the Internet- an international computer network. 14. You can spread*( Present Simple) a lot of your free time surfing the Internet and get* all sorts of information from it. 15. You can enter* ( Present Simple) the chat room with other Internet users and debate* ( Present Simple) urgent problems on line. 16. If you are* ( Present Simple) connectable by e-mail, you can correspond* ( Present Simple) with your own web page and place*( Present Simple) there information about yourself.
17. Today computers help* ( Present Simple) people to do* ( Infinitive) many things. 18. Bankers use* ( Present Simple) them to keep* ( Infinitive) track of money. 19. Telephone operators use*( Present Simple) them to put* ( Infinitive) calls through. 20. Without computers, weather forecasters would make* more mistakes. 21. Computers also help* ( Present Simple) scientists to solve* ( Infinitive) their problems. 22. More than that computers help* ( Present Simple) police to keep* ( Infinitive) order in shops. 23. Computers also help* ( Present Simple) doctors to treat* ( Infinitive) patients. 24. Computers allow* ( Present Simple) users to spend* ( Infinitive) their free time and relax. 25. But computers have* ( Present Simple) some disadvantages. 26. Computers can make* ( Present Simple) people lazy. 27. People waste*( Present Simple) their time when they play* ( Present Simple) different games on a computer. 28. People forget to go* ( Present Simple) to the libraries, they often find* ( Present Simple) information on the Internet. 29. Wicked games can make* ( Present Simple) people, especially children aggressive and stupid.