complate the centences using the future perfect or future continuous.
1) people (use) solar energy extensively
2) people (use) up all natural resources of oil
3) people (travel) into space on a regular basis
4) people (eat) only genetically engineered food
5) traditional farm (disappear)
6) many new galaxies (discover)
7) Mars and Venus (investigate) and (describe) in detail
8) scientist (study) chances of people setting down in other galaxies