Заполните предложения недостающими словами. We are always told that we should 13 our teeth regularly to keep them healthy and to have fresh breath. It is believed that people 14 using a kind of paste to clean their teeth around 5000 years ago. However, the ingredients of these tooth powders were very 15 from ours. For example, the people of 16 Egypt used salt, mint, dried flowers and pepper to create tooth powder. Later, in the 18th century, in some countries in Europe, people brushed their teeth with burnt bread. The first toothpaste 17 in 1890, in Great Britain. At first it was sold in jars. Then special tubes were 18 to make the toothpaste more comfortable to use.

1) suitable

2) clean

3) appeared

4) ancient

5) replaced

6) different

7) designed

8) started