My uncle is（ ）principal of the NO.2 High School of Wuxi.A /B the选哪个?为什么?

This is my uncle's car.(对 my uncle's 提问） The man in the cat is my uncle.(对my uncle提问） My uncle is a policeman.(对划线部分提问）My uncle是划线部分 she is my uncle is daughter.（改为同义句） That man is my uncle. My uncle is a bus he is my uncle 复数 my uncle is a farmer The man is my uncle.用my uncle提问. He is my uncle划线提问 my uncle划线 my uncle is watering the trees 对my uncle 提问 He is my uncle（对划线部分提问,He划线）_____ _____ uncle? uncle,very,always,my,is,busy(连词成句） That is my uncle.（改为复数句子） The person is my uncle.He wears glasses.(合并为一句）The person ( ) ( ) is my uncle. My father'brother is my uncle 对不对 My uncle's son is my c_____. My uncle is my g_________ son .