Many people read comic books, also known as comics. Comics have been around for a long ____ comic books were short and mostly about superheroes. Comics became popular when the character Superman was created in 1938. Superman is still one of the most famous comic characters today. After the ____ of the Superman comics, other characters were created. Captain Marvel is a superhero who became popular in the 1940s. The Captain Marvel comics were so popular that they usually sold better than the Superman comics. Today’s comics are different because there are more kinds. Not all comics today are about superheroes. Comic authors today use comics ____ tell longer stories. These stories can be more like real life. Diamonds are beautiful gems. They are popular all over the world. They are used to make jewelry. Diamonds look sparkly and bright when sunlight hits them. People ____ diamonds in many places around the world. But how is a diamond formed? Diamonds start out as carbon. Carbon is a basic building block of many things on Earth. There is carbon in plants, in animals, and even in many rocks. Diamonds are formed deep inside Earth over billions of years. When carbon ____ and heated inside Earth, a diamond is formed. Diamonds are the hardest natural material on Earth. They are so hard they can only be scratched by another diamond. Because they are so hard, they are used ____ tools. The tools are used for cutting and grinding.

Grammar Usage and Editing 1

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