根据对话内容及首字母提示补全单词,使对话的意思完整正确 A：Look!What's that under the tree?
B :Let's have a l___.Oh,it's a backpack.
A:W___does the backpack belong to?
B:I don't know .Let's o____it.Look here .It m____be a girl's because there is a red T-shirt.
A :Well,it could be a boy's The red T-shirt might be a p___for his sister.
B:Hey,I know whose ibackpack it is.
A:Really?who is the owner of it?
B:It must be Pierre's .The T-shirt has his name on it.