Here are the corrections for the sentences:

1. Those boys belong to the's basketball team.
2. Salima is going to school by bus this week because her bike is broken.
3. My parents have been off work since last Saturday.
4. Maria is practicing the cello in the school's music room at the moment.
5. Owen and his friends have never eaten in the school cafeteria.
6. Trees need water and sunlight for proper growth.
7. Penelope hasn't played basketball since her car accident.
8. We have been living a flat on the fifth floor of this building five years.
9. Though my mother is very busy, she is always home by 7 p.m.
10. The shuttle bus to the train station leaves at 9 a.m. tomorrow.

VII. 1. This helpline has received millions of calls from teenagers and young adults so far.

1. This festival takes place at the end of May and attracts thousands of visitors every year.
2. Prices of consumer goods continually increase due to rising transportation costs.

1. Those boys belong to the's basketball team.
2. Salima is going to school by bus this week because her bike is broken.
3. My parents have been off work since last Saturday.
4. Maria is practicing the cello in the school's music room at the moment.
5. Owen and his friends have never eaten in the school cafeteria.
6. Trees need water and sunlight for proper growth.
7. Penelope hasn't played basketball since her car accident.
8. We have been living a flat on the fifth floor of this building five years.
9. Though my mother is very busy, she is always home by 7 p.m.
10. The shuttle bus to the train station leaves at 9 a.m. tomorrow.

VII. 1. This helpline has received millions of calls from teenagers and young adults so far.

1. This festival takes place at the end of May and attracts thousands of visitors every year.
2. Prices of consumer goods continually increase due to rising transportation costs.