Ответ:

1. The waterwheel is one of the greatest inventions of the humanity.

2. Telescope enables people to watch distant planets and stars.

3. Their last expirement showed a great improvement in the research.

4. In this way our pupils can enlarge their vocabulary.

5. When my childern saw the gifts , their eyes widened.

6. That was very exciting news !

7. Be careful ! The vase is breakable.

8. The first people who made stockings decorated them with pieces of golden and silk cloth.