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1. Our teacher always drives carefuly.
2. If you are not careful, you'll fall off your bicycle.
3. My mother used to wash clothes by hand last year, but now she no longer does it.
4. Shanghai is the largest city in population, isn't it?
5. I am interested in the film.
6. In spite of studying hard, Lan didn't pass the exam.
7. This computer hasn't been used since last month.
8. Her mother has made jams since 7 o'clock.
9. Linda used to live with her parents.
10. It rained heavily, so we couldn't go to school.
