4 Complete the texts with may / might / could, must or can't. It's an animal and it can fly. It! be a bird or it 2 be an insect. It 3 be an elephant! have wings. It 4 It's got two wheels and it goes 60 kilometres per hour. be a It 5 bicycle. It? be a car. It 6 be a motorbike. It's a warm place where you can swim. It 8 be a river or the seaside. It be a swimming pool. It be a bath because that would be too small to swim in! 9 10