Read the sentences and the passage and fill in the blanks with proper words.
Soap is everywhere. We use it every day and it plays an important role in our lives. It also has an amazing history. The e known soap was used in Babylon around 2800BC． Ancient Egyptians also made soap. At one time, soap-making was very dangerous. That is because lye(碱液), which was used in the process could cause chemical burns or even make people blind. Other dangerous m were also mixed with animal fats and oils. Later, soap became a in stores and people gradually s making it in their homes.
Originally, soap was not m used for cleaning. Instead, it was used as gel(凝胶) for making hair stay in place or smell good. The Arabs first made the soap that we know today. They c coloured, liquid, and hard soaps. They even had soaps which were used for shaving.
Soap became popular in the late 1800s. Advertising in Europe and the US helped people understand the connection between cleanliness and good h. Now, soap is something we wouldn't want to live without.
