Mr Tiger: Look at our classroom! What a mess! Whose book is this? Cat: It’s my book. Mr Tiger: Whose cup is it? Duck: It’s my cup. Mr Tiger: Whose cap is it? Duck: It’s Bear’s cap. Mr Tiger: Put away your things! Cat & Duck: OK! After ten minute(十分钟之后)... Cat & Duck: Please have a look at the classroom now. Mr Tiger: Very nice. But whose pen is it? Oh, it’s my pen. Cat & Duck: Ha-ha! 1. 2. 3. 4. a. b. c. d.