Ex. 4 , p.69. Read again and write T for True or F for False sentences. Correct the false sentences. (written) 8 класс

I think computer is very important invention in our life. This is one of the most necessary think. In the past they were very big not useful and expensive. But now every one can afford this beautiful think. Now in schools some teachers can give homework to special web-cite and pupils can see their marks and homework. And in our life computer uses even for work. Every Self-respecting company give to workers computers. Because human can forget very important document. But computer can't! And one more think why to workers gives computers is hard calculations. No one human can remember figure, that have one million numbers!
This arguments can proof the statement "Computer is important"

almost every person in the world has a computer. It  is a very useful invention.especially the computer is indispensable in studies.in the Internet you can find a lot of useful information.for example,  is  there life on Mars or how many teeth have sharks.. Also it is very convenient to communicate with people who are far away from you. An email reaches to the recipient faster than a paper letter. Also, you can talk to your friends and family on Skype, to not only hear them but also see. the computer has many advantages, but  do not forget that it may harm the eyes