Exercise 1
1.  3 ,2,5,1,4
2. 6, 1,2,3,5,4
3. 5, 2,3,1,4

Exercise 2
1. American's lifestyle has similarities with the lifestyles in other countries.

2. European schools and American schools are very different from each other.

3. When people live in different climates their home shelters will differ from each other.

Exercise 3
1. Smoking is one of the leading causes of death in America.
2. Traveling to foreign countries can be very exciting, but its important to get vaccinations to avoid diseases or sicknesses.