1. I came back to school yesterday. 2. Tom cooked soup two days ago. 3. Lucy didn't do her homework yesterday. 4. I won a competition last week. 5. They didn't make a housework yesterday. 6. He wrote this letter in 1998. 7. Mary played tennis two days ago. 8. He began to run four minutes ago. 9. She ate her lunch a hour ago. 10. I helped her yesterday. 11. She did not drive a car last month. 12. I bought a bike one year ago.
