Укажите времена предложений past progressive, past simple and present perfect 1)one day i wanted to prepare lunch but i couldn't . 2) i and my friend were in a summer camp. 3)we fished and watched tv together. 4) while my friend was playing computer games,i read the book. 5)we have already visited
many interesting places.

The world of science doesn't have a bordres. We live in a world where discoveries are make constantly. There are many scientists . For example The great law of gravitation was discovered by Isaac Newtone. Radio was discovered by Alexander  Popov. Russian chemist Mendeleev invented the Periodic Table of Elements in 1869. Every time when scientists make discoveries we understand that we are just a speck in the huge world. The more of discoveries, the more questions. Consequently the world of science doesn't have a borders.

The world of science doesn't have a bordres. We live in a world where discoveries are make constantly. There are many scientists . For example The great law of gravitation was discovered by Isaac Newtone. Radio was discovered by Alexander  Popov. Russian chemist Mendeleev invented the Periodic Table of Elements in 1869. Every time when scientists make discoveries we understand that we are just a speck in the huge world. The more of discoveries, the more questions. Consequently the world of science doesn't have a borders.