3.
根据短文内容,完成下列任务。
It's my backpack!

It's (1)five ten in the afternoon. A policeman (警察) stands near No.2 Middle School. He talks (谈话) with some students.
"(2)这是你的双肩背包吗?" he asks.
"No, it isn't," says Jim.
"It looks like(看起来像) John's," says Mike.
"No,it is not his backpack," says Tom." His backpack is red, but it's green."
Mary comes and says, "(3) Peter can't find his backpack. It's his, I think (认为).
"It isn't his," says Harry. "His backpack is (4) ________________, but it's new.
"Where is your backpack, Jim?" asks Mike.
"Oh,dear! It's my backpack! Thank you!" says Jim.