1. At the end of the film, it turned out that the couple used to be married to each other.
2. I'm really tired this morning - I keep on making mistakes.
3. I'm trying to come up with any ideas for my essay.
4. Sleep helps to tidy up our memories.
5. To find out more about sleep, visit our website.
6. It's not a good idea to stay up all night and study.
7. Last year scientists decided to look into the effects of sleep on university. students.