Read the statements below and tick the correct alternative. According to the text,
I. we can’t form memories when we’re awake.
II. we spend about a third of our lives hoping to sleep better.
III. even when we are sleeping, our brain is working actively.
IV. researches partially explain why the sleep deprived brain keeps more negative emotions than positive ones.
V. recent studies show that all the great scientists had a dream with their experiments.
