排列顺序
A.Oh,yes,it is,It's in the book.Thank you.
B.No,it isn't.
C.That's all right.
D.Excuse me ,where's my ruler?Do you know?
E.No,I can't see it in my desk.
F.Is it in the book?
G.Oh,sorry,I don't know.Is it your pencil case?
H.Is it in your desk?