Who's that girl ___ my sister A This is B She is C It's D Th

Who's that girl ___ my sister A This is B She is C It's D Th Who is that?Oh,--------- Michael.A.this is B.it's C.his D.th 英语选择题：Who's that? ( ) is Lucy. A This B It C That D She's Who is that girl?It's ()Ann A.an B.a C.the D./ -Who is it?____ my mother.A.This is B.it is C.That is D.She Who's that at the door?____ is the postman.A.She B.This C.It Mary,___ is my friend,Emma.A.it B.that C.this D.she What's this?___ A This is a dog B That's C It's a dog D I'm who is that?A.That's a student B.It's Bob C .This is Bob Who is that?( )Mary A it's B she's C that's she is my daughter.A sister B sister's C ___ girl is Jack's sister?A.What B.How C.whose D.which