Exercise-3:
Complete the sentences with the words below.
bears, mountains, spiders, caves, dolphins, elephants, forest.
1 Swimming with ...............is now a popular tourist activity in many places.
2 Our children enjoy riding horses through the...............behind our house.
3 Sometimes we can see eagles flying above the high...........
4 In Alaska, you can watch............in the river, catching salmon.
5 If there are lots of..................in your house, you probably need to clean your rooms more often.
6 I don't like going into...............very much, because they're often full of bats!
7 In Africa and Asia, they sometimes use................to pull very heavy objects.

Exercise-4
Complete the sentences. Write the words in brackets correctly.

ancient, beak, die out ,exist, fossils , hunt, reptiles.

1 People aren't sure what caused dinosaurs to..............65 million years ago.
2 Modern..............look similar to dinosaurs, but they are much smaller!
3 If you are ever near an eagle, keep your hands away from its.............
4 Many people.................animals for sport.
5 Animals from Africa and Asia only.................in zoos in Europe.
6 Jack has a box full of old.............at home.
7 In the..............world, there were all sorts of huge animals.​