Correct mistakes in the sentences below if necessary.

1. by 2050, we will be avoiding a major ecological disaster. 2. by 2100, life expectancy will be being 135. 3. in twenty years we'll all be living under the ocean. 4. in the next ten years everyone will be flying planes. 5. within the next decade the population of china will have reached five billion. 6. in the next fifty years women will have done the same jobs as men. 7. by this time next year l'll be studying at college. 8. in twenty years scientists will be finding a cure for aids. 9. in the next few years people will have driven petrol-free cars. 10. in a few years we'il be choosing the sex of our unborn children.​