根据句意及首字母提示填写单词，使句子意思完整。
1. Mr. Wang is very r________. He has quite a lot of money.
2. Kangkang is feeling truly sad. He f________ the English exam.
3. It's my dream to l________ on the moon one day.
4. Shanghai is in the e________ of China. It's a beautiful city.
5. I'm a s________ here. Can you tell me the way to the railway station?
