Completar frases 6D LISTENING AND VOCABULARYVersión en línea Complete the extracts from the podcast with the words from Exercise 3. Listen and check. por Mrs Filatova 1 mood from suffer swings hormone depression' Disorder 1 . Some people have a feeling of tiredness , a lack of energy , and sudden . 2 . You may be suffering from Seasonal Affective 3 . Studies have shown that when there ? s less sunlight , our bodies produce more of a called ? melatonin ? . 4 . SAD often improves and disappears in the spring and summer , which is why it ? s also known as ? winter . 5 . Experts estimate that between three and twenty percent of people in the UK SAD .