It is not clear how many Amur leopards still live free. One population count was performed in February and March. Wildlife expert Dmitry Pikuuov led this study. It found evidence of seven to nine males. The study identified(确定) three to seven females without cubs. Four leopards were identified as females with cubs. In all, five or six cubs were recorded. Six to eight animals could not be identified.

　　Most of the land where the Amur leopard once lived was in China. New roads and climate change there threatened(威胁) the animals. So did hunters who kill big cats for their body parts.

　　Mr. Pikuuov says adult Amurs need about five hundred square kilometers with good forests to survive. He said they also need a large and continuing supply of animals like deer for food. He believes the answer to saving the Amur leopard is for governments to provide protected spaces for wildlife.

　　52. This passage is probably from

　　.

　　A. a magazine

　　B. a newspaper report

　　C. a TV report

　　D. a film

　　53. Why is the killing of an adult female a huge loss?

　　A. It could lead to the death of an adult male.

　　B. It means it can not give birth to the young any more.

　　C. It is worth more money than a male.

　　D. There is only one adult female in the world.

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