1. **Many teenagers like social networking sites such as Facebook or Twitter. (POPULAR)**
   - Facebook and Twitter are popular among many teenagers.

2. **I think she found your story very amusing. (AMUSED)**
   - I think she was very amused by your story.

3. **It's a pity I can't stay two days more. (ONLY)**
   - If only I could stay two days more.

4. **It'll be better if you get up at 7 a.m. tomorrow. (SOONER)**
   - I suggest you get up sooner, at 7 a.m. tomorrow.

5. **We had an argument and I decided not to call her any more. (STOPPED)**
   - We had an argument and I stopped calling her.

6. **Mrs. Weaver had to work full-time. She had to earn a living for herself and her family of five children. (SO AS TO)**
   - Mrs. Weaver had to work full-time so as to earn a living for herself and her family of five children.

7. **Over 200 people attended the ceremony. Many of them had known Harry as their teacher. (WHOM)**
   - Over 200 people attended the ceremony, many of whom had known Harry as their teacher.

8. **You need to print the form out and sign it. You can send it to apply for the job. (ORDER)**
   - You need to print the form out and sign it in order to apply for the job.

9. **She had graduated from university. She volunteered to work in a hospital. (AFTER)**
   - After she had graduated from university, she volunteered to work in a hospital.

10. **Shirley has a 17-year-old daughter. The daughter's ambition is to be a photographer. (WHOSE)**
    - Shirley has a 17-year-old daughter whose ambition is to be a photographer.