Question

1. What do you think of a solar house?
- I think the solar house makes money for us.
- I think the solar house makes energy from the sun.
- I think the solar house uses the sun to make energy.
- I think the solar house uses the sun to make electricity.
- I think the solar house can save the electricity bill because the sun makes electricity in the solar house.
- I think the ower of the house doesn't need to pay money for using electricity.

(Are the answers all grammatical?)

Answer 1

Yes, all of those answers are grammatical.