13. Complete the sentences with one of the following words: endangered, extinct, rare. 1) A ____ species is a group of animals or plants with a small number of organisms worldwide, usually fewer than 10,000. 2) An animal is ____ when there are not many of its kind alive and it could soon become ____. 3) There are many ____ species that could soon become ____. 4) Dinosaurs lived on our planet a long time before they became ____ 65 million years ago.

1. Rare — это виды с небольшим числом представителей.

2. An animal is endangered when there are not many of its kind alive and it could soon become extinct.

3. There are many endangered species that could soon become extinct.

4. Dinosaurs lived on our planet a long time before they became extinct 65 million years ago.