-( )-It's a desk.A.What's that?B.Who's that?C.This is a desk

what is that on the desk?A it s B there is who is that?A.That's a student B.It's Bob C .This is Bob 英语选择题：Who's that? ( ) is Lucy. A This B It C That D She's what's_?__a pen ?a 、this;this is b 、this;it's c 、 that;that' who's that in the picture?( ) A It's me B that's I C this is What's this?___ A This is a dog B That's C It's a dog D I'm Who is that?( )Mary A it's B she's C that's ()36.Hello.This is Mary._________?A.Who's that B.What is it This is s（） a.teachers'desk b.teacher desk c.t .That's not picture.is on the desk.A.his,His B.her,Her C.her Who is that?Oh,--------- Michael.A.this is B.it's C.his D.th Who's that at the door?____ is the postman.A.She B.This C.It