Понимание структурно-смысловых связей в тексте

Magical transformation of bread

You may eat your sandwich without even thinking about what’s holding it together. But without bread, you won’t have a sandwich. To people from all around the world, bread is an important, familiar food, but it is also an amazing transformer. To turn A __________, your loaf had to go through an extraordinary series of changes.
You only need four ingredients to make bread: water, flour, salt, and yeast. Yeast is a type of microbe, B __________. Flour, C __________, is dry and powdery. When you add water, the flour absorbs the liquid. If you continue mixing, you’ll get a big lumpy blob. As you knead it – D __________ – the blob soon becomes smooth and turns into dough.
After kneading your dough, you must let it rest. It’s time for the yeast to do its job. These tiny creatures eat the sugar in the flour. As they eat, they produce carbon dioxide which forms air bubbles E __________. Bread also needs salt to strengthen dough and make your bread taste good. Now, it’s time to bake.
Even after it comes out of the oven, a loaf of bread keeps changing. As soon as it starts to cool, it starts getting stale. To make hard bread more appealing, it’s best to put it in the oven. The bread becomes softer again. Over time, though, the bread loses flavour and aromas. So, F __________ not be as tasty as it once was. Still, it’s probably good enough for another sandwich.

1. even if you can soften it again, it may
2. press it, stretch it, roll it, and flatten it
3. into those soft, delicious slices of bread
4. inside bread and makes it light and fluffy
5. a living organism which is too small to see
6. you put in an oven and a loaf of bread comes
7. which comes from ground-up grains of wheat