Задание
Match the words with the definitions.
Write the number of the definition near the word.
Boost
Brain
Concentration
Infection
1. The ability to think carefully about something you are doing and nothing else.
2. A disease in a part of your body that is caused by bacteria or a virus.
3. The organ inside the head that controls thought, memory, feelings, and activity.
4. An improvement or an increase, or an action that causes it.