A: Hi, Linda! Where is Jack?
B: He is in the laboratory. up?
A: I found a blue schoolbag. I think it's his.
B: I don't so. His is green.
A: Then is it?
B: It might be Alan's. He was in the laboratory this morning.
A: But Alan's schoolbag is much smaller.
B: Well, let's have a what's in it.
A: Oh, it must be Nancy's. Look! Her school ID card is in it.
B: You're . Let's go and give it to her.
A: Sure. She is in the reading room now.
