exercise 17 More advanced. Fill in according to the clues.
1. If you were to see some of the smartest animals in the world go/going about their daily routines, you couldn’t help but be amazed about how smart they are.
2. Being closely related to human beings, chimpanzees also have the ability to perform complex tasks.
3. While we may look very different, chimpanzees and humans have remarkably similar ways of communicating.
4. You might have heard a parrot say / saying ‘Polly wants a cracker’ before, but they are not only capable of repeating human phrases, they also know how to use the conveyed information to solve problems. So repeating human words is just one of their many tricks.
5. Octopuses use their ink to disorient their victims before killing them with their tentacles. They have been known to break into fishing boats and have been seen to eat / eating the catch.
6. In addition to surprising scientists with their amazing physical abilities, rats have also been shown to be ingenious at solving problems.
7. Research has shown that pigs compete with one another to learn new skills, usually related to gathering food.