下面这个空上该填什么,按规定用Is this提问应用it is来回答,可这里后面又是my aunt son.,咋办?

下面这个空上该填什么,按规定用Is this提问应用it is来回答,可这里后面又是my aunt son.,咋办? is this your aunt 回答是3个空 This is my aunt.(划线提问) Is this your aunt's son?作否定回答 93.He is my c__.a son of my aunt.填什么 This is my _____ .This girl is my sister.横线上该填什么 yes ,and this is my aunt's son,my ( ),David.This girl is my my aunt‘s son is my _____ It is just right.用just right提问?填什么空（ ）（ ） it? hi ,this is a photo of my ( )[这里填什么?] This is Bob.His mother is my aunt.He‘s my c c后面要写什么 William is my aunt"s son.He is my c______.