题目内容：

根据短文内容，用方框中所给单词的适当形式填空，每词限用一次。

The panda is one of the most popular 　1.　 in the world. A panda can grow up to 1.5 meters long and weigh up to 160kg. People think the panda is very　2.　. So it is not surprising that the WWF（世界自然基金会）chose the panda as its symbol. The WWF tells people about animals that are in 　3.　and raises money to save them. The panda only 　4.　 in the wild in China. In the early 1980s, there were only 1,000 left in the wild. The main reason 　5.　 pandas are endangered(濒临灭绝的) is that the area where pandas can live has become smaller.