1. They have already applied new methods in their work.
2. When did you buy this book? – I bought it 3 days ago.
3. Yesterday when the professor came into the laboratory, Jane was writting down the results of her experiment.
4. Before he went to the conference, he had had lunch.
5. Jack will have made this experiment by 6 tomorrow.
6. The students will solve that complex mathematical problem only after the teacher helps them.
7. Where does your friend live? – He lives in the South.
8. If she uses different methods in her experiment, she will get different results
9. Einstein presented his theory of relativity in 1905.
10. Look! The water in the tubeis boiling..
