9. Can you list some ____________(不利条件) of traveling by sea?
8. In my o_________(看法), Nelson Mandela is a modern hero, who has devoted himself to helping black people.
7. A great part of the city was d__________(毁坏)by the earthquake in 1976.
6. Every year, many natural d__________, such as fires, floods, happen in the world.
5. His English is so good that he has no difficulty in communicating with n_______ English speakers.
4. Don’t j_______ a person by his appearance
3. English plays an important r _________ in world communication at present.
2. At a high a__________ of Tibet, the air is difficult to breathe.
1. On the way to the school, she was t_______ in a heavy rain. As a result, she caught a bad cold.