1.Dolphins are very_____.They can do a lot of clever things. 2.Blue whales are really _____.They weigh about 150,000 kilogrammes. 3.Some people are____.They can paint beautiful pictures. 4.There are only a few tigers in the world now. They're very____. 5.Monkeys aren't _____.They don't often fight. 6.Most birds are small and _____,so they can fly easily