I have to go to the doctor from 19:00 to 20:00 on Monday.在这句中from能否换成at?

I HAVE TO GO HOME I HAVE TO GO HOME I have to go to the doctor.（改为同义句） I ______ ______ to go to the doctor. i find the way you have/never to go哪首歌 i have to go for the optional course I have to go to bed. I have to go to make water I have to go to ____ again. I have to go to the doctor on Tuesday改为一般疑问句------you-------to go to the doctor?急 I have to go to the Children's Palace _____ to play the piano. Later I have to go to the Children's Palace to learn the piano. I have to go to the Children's Palace to ______ the piano lessons 英语翻译（2）I have to go to the Children's Palace to learn the paino I used to go to the cinema a lot,but i never have the time now. There is h____any food at home.I have to go to the supermarket to buy some. I have to go to the hospital to look after my mother.(改为否定句) I'd like to go to the p_____________ to have a walk. why do I have to go to bed to make the tea?此话是何意思 I have to go to C_ Palace to learn the piano.