内容要点：（1）老虎是动物园里人们最喜欢观看的动物之一；（2）现在世界上仅存大约3200只老虎，数量日趋减少；（3）老虎处境危险的原因；（4）保护老虎的建议。
注意：文章必须包括所给内容要点，可适当拓展，要求语句通顺、意思连贯、书写工整。
Saving Tigers
Saving Tigers
Tigers are one of the most popular animals in the zoo. But they are getting fewer and fewer now. There are only 3,200 tigers in the world. They are in danger because people often kill them for their meat
