Can you imagine a world without words? The main way that we (1) communicate with each other is by using words. We can communicate either by speaking and listening or by (2) writing and reading. With words, we can give and receive information, ideas, orders, and instructions.
People have used writing to communicate for about 7000 (3) years. At first, they used to draw simple pictures to represent objects, such as people and animals. Then people started to put pictures together to represent something (4) more difficult, like a sentence. The next step in the development of writing was to use symbols, or signs. These symbols represented the sounds of words and not their meanings.
(5) Eventually, the alphabet from which modern English comes was invented in about 1500 BC. The people (6) who invented the alphabet used a set of symbols to represent the sound "o". This symbol is still used to represent the same sound today. Many languages are written with letters of an alphabet, including Vietnamese.