Here are the most suitable answers to fill in the blanks:

27. **A. sun** - "Our houses will use the sun or the wind to make electricity."
28. **B. cook** - "We will have robots to cook our dinner and wash our clothes."
29. **C. special** - "We will have special remote control units."
30. **C. send** - "We can surf the Internet, send e-mails and order food from the markets without getting out of bed."
31. **D. wind** - "They might use energy from air, water or wind."
32. **A. pollution** - "In the future, the air will not be pollution."

So, the completed sentences would be:

In the future, we will live in amazing new houses. Our houses will use the **(27) sun** or the wind to make electricity. We won’t have cookers, dishwashers or washing machines. We will have robots to **(28) cook** our dinner and wash our clothes. We will have robots to look after our children and to feed our cats and dogs. We won’t use computers. We will have **(29) special** remote control units. We can surf the Internet, **(30) send** e-mails and order food from the markets without getting out of bed. We won’t have TVs or CD players because we will have watches that play music, take pictures and tell time. Our cars might not use gas. They might use energy from air, water or **(31) wind**. In the future, the air will not be **(32) pollution**. Our world will be a great place to live in.