选择合适的选项补全对话.
问题描述：
选择合适的选项补全对话.
A. Is it under your book?B. It's in your backpack.
C. Do you know?D. Thanks.
E. No,I don't know.
A: Mum,where is my pen? __1__
B. __2__ Is it in your pencil case?
A. No,it isn't.
B. __3__
A. No.I can't see it there.
B: Look! __4__
A. Oh,yes.It's here.__5__
1.___2.___3.___ 4.___5.___
答
C E A B D