Is this your book?No,I think it's____?

Is this your book?No,I think it's____? This is not ___watch.I think it's____ Is this your eraser?---No,it isn't.I think ___.A.it her eras I think this TV s____ is boring is this your book?no,it's 什么.（提示he) I think this book ___(it) is very interesting. This is s____ an interesting book.I ;ike it very much whose watch is this?it's____(i). This Eenglish book is not_____.Maybe it `s____. Is this your book?Yes it's_ book _your teachers short?No,the 改错i think this is a good book.i don't think it Is this your book?Yes,it is