根据句意填入所缺单词。
1. There is an old _____ over the river. Every day many people go across it.
2. You need to _____ from the No. 1 bus to the No. 2 bus.
3. If you drive too fast, you may have an _____.
4. My parents live in Shanghai while I am in Beijing. I often _____ them very much.
5. Be _____. Don't drive too fast. It's dangerous.