补全对话A,I'm afraid I've lost my bag.B,Is this __________?It's

补全对话
A,I'm afraid I've lost my bag.
B,Is this __________?It's made of plastic.
A,No,it's not _________.It's Miss Li's,It's_________bag._________is made of plasitics.
B,Is it _________bag?It's made of leather.
A,No,it's not my bag,___________
B,What's ___________ bag made of?
A,_________is made of paper.
B,A paper bag?What is it used for?
A,It's used for storing food.
A,