根据句子意思，用括号中所给词的正确形式填空。
1. English is used a lot ____________(widely) than French.
2. The young man died in his _____________ (forty), and his family felt very sad.
3. Did you do anything for your own (safe)?
4. He lived at the foot of South Hill and ___________ the fresh air.(breath)
5. The footprints must be one of the ____________(murder)