根据短文内容，判断句子正误。

We all know the 2022 Beijing Winter Olympic Games(冬奥会), But do you know the firemen who are guarding(守护)the Olympics? I think they are great, too.

Allen is my uncle. He lives(居住)in a city near Tianjin. He is a fireman. There are about5, 000 firemen in the city. They are ready (准备) to answer an alarm(警报器)at any time of the day or night. Many alarms are for small fires. Firemen can put out them in a short time. But sometimes (有时) the fire is big. There is very heavy(浓的) smoke in a big fire. That's very dangerous (危险的). Firemen sometimes have to enter the fire to rescue (营救) the people inside. Uncle Allen's work is dangerous, but he is proud (自豪) of his job. He likes the job very much.