hee 23. They've lunch. They A) have / had B) had / have it at 12 o'clock. C) had / having D) had / had 24. I've my homework. I A) done / done C) done / did it after supper. B) did / done D) did / did ? 25. A: Have you tidied your room B: Yes, I've tidied it. A) yet / just C) already / just B) just / yet D) already / just 26. I've never A) saw / eats anyone who B) seen / eat more than you. C) saw / eaten D) seen / eats 27. Bob's not here. He's A) been B) went to work. C) gone D) being 28. My brother's A) been B) gone to America 4 times. C) went D) being 29. It's good to see you again. Where have you A) gone B) being C) been ? D) went 30. Mary's hair looks nice. She's just to the hairdresser's. A) gone B) been C) was D) went smoking. 31. It's terribly difficult to give A) on B) off C) of D) up​

Computers have had a great impact on society.
 Computers are used in eve­rything
Not only have computers had a great impact on our everyday life, but also on education and the workplace.
The Internet has had a huge impact on society.
Around the world, the Internet is available to millions of people.
the majority of the information and services avail­able are free in the Internet.
The idea of remote learning can be applied everywhere.
 Although com­puters can cause some problems, such as unemployment and computer vi­ruses, these are far outweighed by the benefits computers provide.
computers and technology will continue to have an increasing effect on society

Компьютеры оказали большое влияние на общество. Компьютеры используются во всем.Компьютеры оказали большое влияние Не только на нашу повседневную жизнь, но и на образование и на рабочие места. Интернет оказал огромное влияние на общество. Во всем мире,  Интернет доступен миллионам людей. Большинство информации и услуг, доступны бесплатно в Интернете. Идеи дистанционного обучения могут быть применены во всем мире. Хотя компьютеры могут вызвать некоторые проблемы, такие как безработица и компьютерные вирусы, они намного перевешивают преимущества которые компьютеры предоставляют. Компьютеры и технологии будут продолжать оказывать все большее влияние на общество

If you go to school or university, you are faced with a number of exams. Basically, these exams are supposed to test your knowledge and skills. Also, they may motivate you to study harder.

In my opinion, it is really the case that exams motivate students to study harder. Firstly, exams are often a pass to a higher level of education. If you get good marks in examinations, you are admitted to further education. If you fail, you do not get the admittion. So, you make every effort to keep the right to study further. Secondly, exams are a good way to assess your learning efficiency and detect possible gaps in your knowledge. Bad marks mean that your knowledge is flawed and you need to be more disciplined and work harder to do away with the flaws.

But there are people who believe that examinations do not give real motivation to a student. They say that being a good student with excellent marks does not guarantee future prosperity.

Nevertheless, I cannot assent to the foregoing opinion, because being a good student is the beginning of being a good employee or worker who can earn a good living. Highly qualified professionals are always in great demand in any business sector.

In conclusion, exams play an important part in our life, although any exam is a kind of pain. But the saying is: no pain, no gain!