1. That was only a casual (偶然的)meeting.
2. We advertised (做广告) our second-hand computer on the newspaper.
3. What’s the basis (根据) of this theory?
4. What’s the feature (特色) of the small mountain village?
5. His conscience (良心) pricked him because he had cheated on the exam.
6. The pyramids (金字塔) in Egypt are very famous in the world.
