用所给单词和短语的适当形式完成下列句子。
convince,Switzerland, direct, bore, wear,pick out,
badly off, perform, astonish, cut off, fortunate
1. You mustn't laugh at ____ people.
2. No one has come up with a ____ explanation of why dinosaurs died out.
3. ____ is famous for its milk and cheese.
4. Because of the earthquake, all the supplies of electricity and water have ____.
5. The car rushed at the bridge at ____ speed.
6. I feel very ____ and lonely.
7. The best ____ goes to them.
8. Driving with ____ tread(s) (轮胎) can be erous.
9. How could you ____ your own motorbike in a sea of motorbikes?
10. We are now living in a very bad condition but someone is even ____.