1. The shop uses only recycled paper (recycle)

2. Our sales are decreasing (decrease)

3. Crime is on the increase in big cities (criminal)

4. They are tired, so they can sleep easily

-> They are tired enough to sleep easily

5. It's necessary to recycle trash

-> Recycling trash is necessary

6. Getting natural gas is difficult

-> It's difficult to get natural gas

7. I think we should turn off the computers after class

-> I think we shouldn't turn on the computers after class

8. Japan has high life expectancy because of its good diets and healthcare

-> Because Japan's good diets and healhcare, they have high life expectancy

1. The shop uses only......recyclable.............paper (recycle)
2. Our sales are...... decreasing.................(decrease)
3. ..Crime.....is on the increase in big cities (criminal)

5. recycling trash is necessary
6.  it's difficult to het natural gas
7. I think we shouldn't turn on the computers after class
8. because japan has good diets and healthcare,  Japan has high life expectancy