题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式，并将答案写在答题卡上。

Every animal species has its own features. Some animals have the power to run 1. (fast) than sports cars, while others move very slowly.

But the slowest animal in the world is not the turtle, as we may think. It is the three-toed sloth(三趾树懒), 2.lives in the rainforests of South America.

Sloths can be 60 to 80 centimeters long and 3. (weigh) about eight kilograms. It takes them about one minute 4. (climb) only 1.8 to 2.4 meters. They sleep for more than 20 hours every day, staying in the trees most of the time. They come down from the trees to defecate (排便) just once a week. This is the most dangerous time for sloths , as they might 5. (attack) by their enemies, such as big cats.

Sloths may be slow climbers, but they are speedy 6. (swim). They can 7. (natural) float on the water. Since there are always floods in rainforests, the ability to swim is necessary to 8. (they) survival.

People might not be familiar with sloths before. It was because 9.the 2016 Disney film Zootopia that we began to be interested in this animal species. Its lovely image has left a deep 10. (impress) on almost every moviegoer.