Ответ:

3. 1. Studying hard at school is important.

2. Is important to saving money for the future.

3. Being happy is the most important thing in life.

4. The most important life event is getting married.

5. Learning how to cook before you leave home is important.

6. Living in a foreign country is the best way to learn foreign language.

7. Looking at old photos is fun.

8. It's difficult to get up early in the winter.

4. 1. d

2. e

3. b

4. c

5. a

6. f

7. go on date

8. get a job

9. leave home

10. buy a flat

11. get married

12. fall in love

13. bye a flat