Задание 
Match the words with the definitions.
Write the number of the definition near the word.
Toothpaste [ ]
Milk teeth [ ]
Tooth decay [ ]
Enamel [ ]
The hard, white, shiny substance that forms the covering of a tooth.
When your teeth become worse or damaged.
Teeth of young children and some other young mammals that fall out and are replaced by permanent teeth.
A substance that you put onto a toothbrush to clean your teeth.