____sweater is this怎么填空

____sweater is this怎么填空 This is is this This is THIS IS this is this is Who's____boy in ____sweater?A.the,a b.the,the请说明为什么? this is 比如 this is fly Is this a book? Yes,this is. This is life .This is live! This is Mary.意思不变：This is （ )( ) This Is Me,This Is You 歌词 This is a man提问( ) is this? this is kangkang.为什么用this is 《This is my This is my This is (he).This is (me). what is this?-It is.