Are they brother and sister中的and为什么不换成or?or不是用在疑问句和否定句吗?You have no brothers or sisters。中的and为什么改成or

Tom and linda are brother and sister aTom and linda are brother and sister and,mr brown is ( )(they)father. They are my parents,my sister,my brother and I. 改错-is your brother and sister workers?yes,they are Are they sister and brother?要求是肯定回答! 改错-Is your brother and sister workers? Yes,they are mum,they are ( )classmates rose and ( )brother david 英语翻译可否回答为They are brother and sister. They are his sister and brother.把his sister and brother提问 They are sister and brothersister and brother为什么不用复数? They are Peter and his brother(对 Peter and his brother提问) Tom and Linda are brother and sister,and Mr Brown is ___ (they) father. Are they your ____(brother) They are your brother 改错 My brother and sister are not in the same school.They are in ____ schools. Nick and Neo are not brother.They are f___f___该填什么 Tom and Mary are brother and sister.they ____ in a large house. Tom and May are brother and sister .They always do homework t_____ tom and linda are brother and sister.they livea big house.