恐龙大约在6500万年前灭绝了。

Dinosaurs ___died ___out about 65 million years ago.

第二点是，由于污染，很多动物将会灭绝。

A second point is that a lot of animals are going to ___die ___out because of pollution.

如果我们不保护它们的栖息地，这些独特的植物最终将会消失。

If we don't protect their habitat, these unique plants will eventually ___die ___out.