People make bread in different ways, / but the bread that’s made in Britain contains five ingredients. / There’s water, flour of course, / and then there's salt, sugar and something called yeast. / A long time ago，people made bread just from flour and water, / and their bread looked and tasted very different from the bread we make today. / It was a different shape—like large flat biscuits, / and it was dark brown in colour. / But it was too heavy to digest. / Then the Egyptians discovered that yeast, / which is a kind of fungus, will make bread rise. / Well, in fact，if you look at a modern loaf of bread through a microscope, / it looks a bit like a sponge, doesn't it? / Full of little holes. / Well, the holes make the bread lighter, of course，and easier to digest. /