Ответ:
1. This is a bicycle. The bicycle is too small for me.
2. My father's sister is my aunt.
3. The Mars is the forth planet from the Sun.
1. I am a student.
2. You and I are Russians, they are English.
3. It is his aunt.
4. She is a doctor.
young - younger - the youngest
expensive - more expensive - the most expensive
bad - worse - the worst
much - more - the most
busy - busier - the busiest