按要求完成句子。
1. time/is/for/ it/ class/our (.) (连词成句)
_____________________
2. go/ the/ playground/ let/ us/ to (.)(连词成句)
_____________________
3. We have Music. (改为一般疑问句)
_____________________
4. I have a Science class in the morning. (改为否定句)
_____________________
5. He has Music in the afternoon. (就划线部分提问)
_____________________