answer to exercise 17 p. 170

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 ‘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.