Что значит Operating System not found

Замените фразы одним словом Example: not countable - uncountable Not necessary - Not safe - Not tidy- Not breakable - Not regular - Not real - Not expensive - Not happy - Not possible - Not usual- Not comfortable - Not direct - Not interesting - Not

Помогите перевести текст. The UK has three main systems of education: the comprehensive system, the selective system and the private system. Usually children go to a primary school at the age of five and stay there until they are eleven.

Задание : Write the short forms He has got Has not got He is Is not I am I am not They are Are not I have Have not Cannot She will Will not Shall not I would Do not Does not Did not Was not Were not

Проверьте на ошибки! Hello Bill. How are you? I recently heard that you started working on a new operating system windows. I think your invention you made in 1981 changed the way people thought about Computers.

Where was the first dinosaur bone found? Where were a lot of fossils of nests eggs and babies found? Where was the dinosaurs 8 cm-long tooth found? Where was the smallest dinosaur found? Where was the second biggest dinosaur found?