1. Some teenagers in my school are not very well-behaved but fortunate all **my friends are**.

2. I’ve **had** a very happy childhood so I sometimes forget that **others haven’t**.

3. Spending quality time together is important for most families but unfortunately it’s not always possible **to do so**.

4. Some people think that having a child is not a major responsibility but obviously **it is**.

5. **I would like to** bring up my children in a large family just as **my parents did**.

6. Not everyone wants to keep in touch with their old school friends when they leave school but I **would like to**.

7. I would like to bring up my children in a large family just as **I was**.

8. Many of my friends say they want to leave home to study overseas but **they haven’t**.

These phrases help complete the statements in a way that makes them coherent and logical.