债权有哪些类别？
参考答案：
①合同之债与法定之债。
②按份之债与连带之债。
③可转让之债与不可转让之债
句型转换，每空一词。
1. My birthday is May sixth.(对画线部分提问)
_____ is _____ birthday?
2. Peter is twenty years old.(对画线部分提问)
_____ _____ is Peter?
3. They have a Music Festival.(改为一般疑问句)
_____ they _____ a Music Festival ?
4. What's her age? (改为同义句)
_____ _____ is she?
5. the, third, month, March, is, year, the, of (.) (连词成句)
_____________________________________
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