补全对话
A: Good afternoon, Tom. Where are you going?
B: 1             .
A: Oh, to buy books? You are out! Why not go to the Readers' Room?
B: The Readers' Room? 2                .
A: It is a place where students can exchange their old books with others.
B: That sounds great! 3               .
A: It's next to Renmin Hospital, across from City Park.
B: Oh, it's a little far. 4                .
A: You can take No. 7 bus.
B: How long does it take?
A: 5               .
B: Ten minutes isn't a long time. OK, I will go there. Thanks!