Gap Fill - Paragraph One


  • Choose the correct word from the drop-down menus below.
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.
  • After this paragraph, go to Paragraph 2.
   functions      lot      mental      much      nap      normal      some      thought      tired      totally  

Paragraph 1

Have you ever wondered why thinking too makes you tired? A new study has found out answers to this question. Researchers from the Paris Brain Institute looked at why effort makes us tired. They found that when people think a , the brain releases a chemical called glutamate. Too much glutamate upsets the brain's . It means the brain tells the body it is and that it must rest. People who spend more than six hours working on a task that requires a lot of are more likely to feel tired. A period of rest allows the brain to return to . This explains why a power nap is good for us. A power can be as short as 20 minutes, but can make us feel refreshed.

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