---What will you do if it_____ tomorrow?---I'll stay with my grandmother and have a chat.A.will rain B.rainsC.is rain D.rain正确答案是B,为什么其他3个不行?

what will you do? What will you do tomorrow? If you know what will you do do what you say you will what will you have fun ___ ?(do) What will you do this summer? 连词成句 will do what you you what after do today will school? what will you do at this time? what will you do there的意思 What will you do?的意思? what will you do there怎么回答 what will you do after class意思 what will you do tomorrow意思 what will you do in the future? what will you do in shanghai What will you do this weekend? what will you do later翻译,急