中考语法填空热点话题考前冲刺集训04-备战2022中考英语语法填空热点话题+体裁分类训练(中考模拟题+名校真题)(1)

备战2022中考英语语法填空热点话题+体裁分类训练 (中考模拟+各地真题) 中考语法填空热点话题考前冲刺集训04 （2021·四川·东辰国际学校九年级竞赛）阅读短文，语法填空。 Sniffer dogs (嗅探犬) are very common at airports all over the world, where people use them to look for things against the law. Now some dogs are using their noses for a ____1____ (difference) purpose—coronayirus. Dogs specially trained ____2____ (discover) COVID-19 have started sniffing passengers at Finland’s Helsinki-Vantaa airport. Volunteers are training a team of 15 dogs and 10 instructors ____3____ (strict) for there search programme. The dogs can discover coronavirus in humans five days before they develop symptoms (症状), Anna Hielm- Bjorkman, the University of Helsinki professor who is running the test, ____4____ (tell) Reuters News Agency. “They are very good ____5____ discovering coronavirus. We come close to 100% sensitivity,” she said. Passengers wipe their necks with cloths, ____6____ are then placed in a can and put in front of dogs to sniff. Within ____7____ (minute) people can know the