Ответ:

1. the white car is the fastest in this garage.

red car is slower than blue car.

2. the house В is more modern than all the houses in this city.

the house С is more modern than the house А.

3. Lisa is the youngest in this class.

Kate is older than Mary.

4. Neptune is colder than all the planets in the solar system.

Uranus is colder than Jupiter.