by
⑴Is this your book? A. That's OK.
⑵Is this your pencil? B. Yes. Thank you.
⑶I'm sorry. C. No. This is not my book.

This is …

I'm a cat.
My mother has an apple.

⑴our school A.一只黄色的猫
⑵my teacher B. 那是
⑶a yellow cat C. 我的老师
⑷good child D. 我们的学校
⑸that is E. 好孩子
⑴
A. sister
⑵
B. father
⑶
C. brother
⑷
D. mother