Vocabulary

People love dolphins because they are beautiful to watch and friendly. Dolphins are also... of the cleverest animals.

... is possible to teach them the same way we teach dogs.

Some people ... believe that dolphins have a special way of talking to each other.

... many other sea animals and fish, dolphins are in danger.

Many dolphins are caught ...mistake in fishing nets.

But,a ... greater problem is that thousands of dolphins are dying because the sea is no longer clean enough.