题目内容：

I was waiting on the station platform for the Tianjin train when a man asked me if I knew the time of the next train to Tianjin. I often had to go there myself, so I knew and told him .A few minutes later an old lady wanted to know whether the train to Shanghai had already left. I knew that it had not, So of course ,I told her . Then a girl came to me and asked why the train from Nanjing was late. I just told her that when trains were late, it was usually because something had happened. I was wondering why all these people were asking me those questions when I noticed that I was standing next to a sign that said “Inquiry Office.”

根据短文内容回答问题。

1.What was the writer doing at that time?

2.How many persons asked him questions?

3.Why was the train from Nanjing late?

4.Could he answer all the questions?

5.What’s the Chinese meaning of “Inquiry Office”?