Change the forms of the following sentences. 句型转换。
1. The coat costs fifty dollars.(对划线部分进行提问)
2. We are getting ready for school.(同义句转换)
3. Lynn is leaving for America next week.(同义句转换)
4. People arrive for the party at 5:00.(对划线部分进行提问)
5. I asked Santa for something at Christmas.(变为一般疑问句)