1. Read and number.
Different Dogs
Dogs are our friends. Some of them are cute, and we love playing with them. Some of them are cool, and they can protect us. Some of them are clever, and they can do many things for us. Some of them are useful, and we need them to save our lives.

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1; 3; 2; 4

2. Read and choose.
Guide Dogs Police Dogs Rescue Dogs Pet Dogs
1)
They are cool. They can run fast and jump high. They may bite if necessary. But we will thank them for their biting.
2)
They love being with people. They are good friends of people.
3)
They are kind to people. They are well-trained. They can be the “eyes” of blind people. They help their owners live a normal life.
4)
They are good at hearing and sniffing. They can find people under rubble (瓦砾).

Police Dogs; Pet Dogs; Guide Dogs; Rescue Dogs

1) 描述“酷，跑得快跳得高，必要时会咬，人们会感谢它们的咬”，符合警犬（Police Dogs）职责，选Police Dogs。
2) 描述“喜欢和人在一起，是人类好朋友”，符合宠物狗（Pet Dogs）特点，选Pet Dogs。
3) 描述“对人友好，训练有素，是盲人的‘眼睛’，帮助主人正常生活”，符合导盲犬（Guide Dogs）功能，选Guide Dogs。
4) 描述“擅长听和嗅，能在瓦砾下找人”，符合救援犬（Rescue Dogs）作用，选Rescue Dogs。