Read the article again and answer these questions.

1 What do you think happens to the small food shop when a supermarket starts business?

2 Is the red squirrel like the small shop or the supermarket?

3 Why did the grey squirrel come to Britain?

4 Do all invasive animals cause the extinction of native animals?

5 Are there more large animal invaders than small ones?

6 Why do you think the apple snail doesn’t cause many problems in Europe?

7 Is it common to find good things about animal invasions?

8 Who is Britain selling mitten crabs to, and why?

3a Complete this paragraph with much, many, a lot of, little or few.

There are many or a lot of animals that are invaders, but perhaps there are 2) ________, if any, invaders that are worse than humans. 200,000 years ago there were very 3) __________ humans. Now there are nearly six billion of them. Unfortunately, there isn't 4) _________ information about the early history of this species, but it seems certain that the first humans came from Ethiopia in east Africa. After 5) ___________ thousands of years (150-180) humans were living on every continent on Earth. How 6) _________ damage have these invaders caused? They have destroyed 7) _____________ native plants and animals. Before humans, there was 8) __________ pollution. Now, there is 9) _________ pollution and it is causing 10) ___________ harm to the global environment. It seems that humans need to change things about their lifestyle if they want to survive.

3b Look at the sentences. How do we compare things in English? When do we use as…as? When do we use than? When do we use more/less +adjective?

Cows are as big as horses.

Seals aren’t as smart as dolphins.

Alligators are longer than lizards.

Snakes are more dangerous than spiders.

Spiders are less dangerous than snakes.

3c Look at the pictures and compare these animals using as…as, less…than, more…than.

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