题目：
根据上下文提示，补全对话。
A: Excuse me, mom. (1) ______ my baseball glove?
B: Sorry, I don't (2) ______. Is (3) ______ on your desk?
A: No, it isn't.
B: Is it in your (4) ______?
A: No, it isn't in (5) ______ backpack.
B: Is it (6) ______ your bed?
A: (7) ______, it is. It's under my pillow. And where's my baseball?
B: Is it (8) ______ the desk?
A: No, it isn't.
B: Is it (9) ______ the chair?
A: Oh, yes. It's under the chair. (10) ______ mom.
B: You're welcome.
答案：
1. where's 2. know 3. it 4. backpack 5. my
6. on 7. Yes 8. under 9. under 10. Thank you
