1. An elephant is the strongest animal. 2. How much did Duyen weigh last time? 3. He drives more slowly and carefully than I do. 4. He solved that exercise in an hour. 5. The last time I played soccer was 1 month ago. 6. What is the distance from Hai Phong to Ha Noi? 7. They must wear formal clothes when attending the conference. 8. Despite Tom's bad grades, he was admitted to the university. 9. Unless she invites Jack to the party, I won't help her prepare the food. 10. Because it was raining heavily, we couldn't keep on cleaning the streets. II. 1. Traffic jam is one of the most common issues in big cities around the world. 2. My father used to go on holiday to the seaside last summer. 3. Titanic is a romantic film which was directed by James Cameron. 4. How long were they at the seaside during last summer holiday? 5. Hoa is measuring her height and weight on the scale at the moment. 6. This year's summer is hotter than last year's summer. 7. My dad is the greatest person in the world. 8. If you want to lose weight, you should do some exercise. 9. No one should be late for school tomorrow because we have an exam. 10. Parents ought not to let children be exposed to smartphones at an early age.