I. 1. dangerous

   2. disagree

   3. standing

   4. will fall down

   5. impossible

   6. less; more

II. 1. More and more; will; environment

    2. will; apartment

    3. some; others

    4. believe my eyes

III. One possible version:

Life in Fifty Years

Life in fifty years will be different. What will the changes be?

Firstly, the population is growing fast. There will be more and more people in the world and most of them will live longer than before.

Besides, at home, robots can help people do most housework, such as sweeping the floor, washing the dishes, and even cooking, then people will spend fewer hours on housework and have more free time to do sports, watch TV and travel. More people will go to other countries for holidays.

What’s more, work will be different in fifty years. Dangerous and hard work will be done by robots. Because of this, many people will be unable to find a job. This will be a problem.