Final answer:
The sentences are completed using comparative adjectives such as smaller, bigger, cheaper, more expensive, faster, and slower to compare the green car and the red car.
Step-by-step explanation:
The completion of the sentences using comparatives would look like this:
- The green car is smaller than the red car.
- The red car is bigger than the green car.
- The green car is cheaper than the red car.
- The red car is more expensive than the green car.
- I think that the red car is faster than the green one.
- The green car is slower than the red one.
- The red car is much bigger (or whatever adjective finishes the sentence)
Learn more about Comparative Adjectives