题目内容：
提示：A正在询问B如何去图书馆的问题，B一一进行了回答。 A: Excuse me, I want to go to the library. 51 ?
B: Go down this street and turn right at the second crossing. Go up the road to the end, you'll find it.
A: 52 ?
B: It's about 1,000 metres away from here.
A: Oh. That's quite a long way.
B: Yes. You'd better take a bus.
A: 53 ?
B: You can take the No. 5 bus. It'll take you there.
A: 54 ?
B: It takes about fifteen minutes.
A: 55.
B: It's a pleasure.
根据以上内容,回答题
第51题应填入_____
参考答案：
答案解析：