sports centre спортивный комплекс
You mustn't eat or drink in the class room
Ты не должен есть или пить в классе
You mustn't play ball game in the building
Ты не должен играть в мяч в здании
You mastn't be rude to your teacher
Ты не должен быть грубым с учителем
Did Alexander Graham Bell really invent the telephone?
Well, Bell and a scientist, Gray, had the same idea at the same time.
Were scientists trying to invent the telephone at that time?
Yes, lots-for example: Manzetti, Meucci, Reis, Edison.
Все очень элементарно.
The computer is a machine,it can't support you, like people. On the computer we print, play games. It can sit no more than 2 hours. The computer harms a person if you sit in it for a long time. This machine is useful for a person,it can help you with something,for example to find information.
Ошибки в тексте возможно имеются,я не знаток английского языка.