3a-self checkUnit 4Where is my schoolbag?(我的书包在哪儿? )Revision(复习 )Wheres the?Its on/ in/ under .Where are the ?They are in/ on /under theA: Is the dog on the chair?B: Yes, it is.A: Is the baseball on the sofa?B: No, it isnt. Its under the sofa.A: Are the books on the desk?B: No, they arent. Theyre in thebookcase.A: Are the books on the sofa?B: Yes, they are.Wheres the baseball?Is it on the table?No, it isnt.Is it under the table?Yes, it is.Where are the books?Are they on the sofa?No, they arent.Are they in the bookcase?Yes, they are.