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The Great Wall of China is the longest wall people ever built.

The Great Wall of China is the longest wall people ever built.

It stretches on and on for thousands of kilometres. It took many, many years to build.

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Builders wear hard hats to keep their heads safe. Builders wear hard hats to keep their heads safe. A crane is a tall machine that lifts heavy things up high. A crane is a tall machine that lifts heavy things up high. Bricklayers stack bricks with sticky cement to make walls. Bricklayers stack bricks with sticky cement to make walls. Plumbers fix pipes so clean water can reach our taps. Plumbers fix pipes so clean water can reach our taps. Architects draw plans that show how a building will look. Architects draw plans that show how a building will look.