Change the following sentences. 句型转换。
1. They will go to school by bus.(对画线部分提问)
go to school?
2. There's some milk in the cup.(改为一般疑问句)
milk in the cup?
3. This is a box and that is a knife.(改为复数句)
4. They get up at 6:30.(对画线部分提问)
get up?
5. Mary's birthday is November thirteenth.(对画线部分提问)
Mary's birthday?