The key answer of exercise 1

a)

1. The brain can't live more than six minutes without oxygen.
2. Scientists think eating seafood might reduce dementia by 30%.
3. Everyone has four to seven dreams each night, but some people can't remember their dreams.
4. After five minutes, you will be able to remember only 50% of your dream. After 10 minutes, only 10%.
5. In the future, the Japanese think they will be able to show people's dreams on film.

b) -