Question

4. Circle the best form of the verbs, the Present Perfect or the Past Simple. 1. Kyrgyz people have used/ used the som for more than 20 years. 2. Dinosaurs have lived / lived on Earth for 160 million years. 3. People in Russia have known / knew about potatoes for about 250 years. 4. For thousands of years people have thought thought that the world was flat. 5. People in Europe have only known / knew about Australia for about 400 years. 6. People have invented / invented the Internet in 1969. 7. The humans have existed / existed for more than 2.8 million years.​

Answer 1

Kyrgyz people have used the som for more than 20 years.

Dinosaurs lived on Earth for 160 million years.

People in Russia knew about potatoes for about 250 years.

For thousands of years people have thought that the world was flat.

People in Europe have only known about Australia for about 400 years.

People invented the Internet in 1969.

Humans have existed for more than 2.8 million years.