1. In summer the nights are shorter than in winter.
2. His bedroom is the smallest room in the flat.
3. My brother is younger than my sister.
4. Her presentation was longer than his report.
5. Olga is as pretty as Kate.
6. This car is the fastest.
7. This season of the year is the best.
8. This film is more interesting than the play.
9. Their TV set is more modern than our one.
10. Our country cottage is more beautiful than our friend's house.

Ответ:

1) shorter

2) the smallest

3) younger

4) longer

5) pretty

6) the fastest

7) the best

8) more interesting

9) more modern

10) more beautiful