Помогите поставить в подходящую форму.Measuring health and happinessHow do you measure

Помогите поставить в подходящую форму.
Measuring health and happiness
How do you measure happiness? Perhaps health is the best way because a famous doctor once said, Happy people generally dont
get sick. Its also 1. ______ to measure how many people feel ill or unhealthy in a country. For example, one survey says Iceland is the healthiest country in the world because men and women live a long
time there, the air is very 2.______ and there are more doctors
available per person than anywhere 3.______ in the world. However, there was another survey of the happiest countries in the
world and Iceland was not 4.______ the top. The questions on this
survey 5.______: How much do you earn? How healthy are you? How safe do you feel? After visiting 155 different countries, the
researchers 6.______ that Denmark feels happier than other countries.
1. clean
2. clear
3. decided
4. discussed
5. easy
6. else
7. included
8. near