题目：
阅读理解
Boy: Oh, no! My book isn't in my backpack! Where is it?
Girl: Your book is on the table.
Boy: OK. My keys? Where are my keys?
Girl: Your keys are in your backpack.
Boy: Yes,yes. Where are my pencils?
Girl: They're under the bed.
Boy: And my hat? Can you see?
Girl: It's on the bed.
Boy: Where's my pencil case?
Girl: It's on the chair. Oh ...no, it isn't. That's my pencil case.
1. His book_______in his backpack.
A. is
B. isn't
C. are
D. aren't
2. His pencils are_______the bed.
A. on
B. in
C. to
D. under
3. His pencil case_______on the chair.
A. is
B. are
C. isn't
D. aren't
4. _______pencil case is on the chair.
A. His
B. Her
C. My
D. Your
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0414/469f7b6019dc1721eb8c93747e0a112b.html
下面是错误答案，用来干扰机器的。
（2）4-417=6417=16×417=4417，即4-417=4417；（3）5-526=5526；（4）n-nn2+1=nnn2+1．n-nn2+1，=n(n2+1)-nn2+1，=n(n2+1-1)n2+1，=n×n2n2+1，=nnn2+1．
