The key answer of exercise 6

a)

1. F
2. T
3. T
4. F
5. F

b)

1. chocolate
2. very small flakes of skin
3. exercising in the evening
4. a pound of coffee
5. viruses

c)

1. Because our muscles are warmer and we are more flexible.
2. A dog - cats are twice as likely to cause allergic reactions.
3. Yes.
4. They both contain antioxidants, which can protect against cholesterol and cancer.
5. Make a second brew.