Here are the completed sentences with the provided words:

1. To meet his parents' **expectation**, he spends five hours practicing the piano every day.

2. My parents asked me to tell them what gave me so much **trouble**.

3. We need to prepare food, do laundry and chores at home. It’s **housekeeping**.

4. Tom’s teacher was upset with him because of his bad **account** of what happened at school.

5. I think teenagers don’t have much leisure time because they have too many assignments and **competitions**.

6. You have to log on to the **account** if you want to get the information you need.

7. He plays chess to relax, but he’s now confident enough to enter **competitions**.

8. Many girls worry about their **appearance**, so they often look at themselves in a mirror.

Feel free to ask if you need any further assistance!