Here are the corrections for the sentences provided in the exercise:

1. **Incorrect:** They go to the school five days a week.
**Corrected:** They go to school five days a week.

2. **Incorrect:** Viet Nam is the country of many religions and beliefs.
**Corrected:** Viet Nam is a country of many religions and beliefs.

3. **Incorrect:** My son started to play the baseball when he was ten.
**Corrected:** My son started to play baseball when he was ten.

4. **Incorrect:** How often is festival celebrated? - Every year.
**Corrected:** How often is the festival celebrated? - Every year.

5. **Incorrect:** There is a LG television in my room.
**Corrected:** There is an LG television in my room.

6. **Incorrect:** Emily comes from the France.
**Corrected:** Emily comes from France.

7. **Incorrect:** Today, we are going to discuss necessity of traditions.
**Corrected:** Today, we are going to discuss the necessity of traditions.

8. **Incorrect:** Woman of the house looks after her parents, husband and children.
**Corrected:** The woman of the house looks after her parents, husband, and children.

9. **Incorrect:** You don’t should litter the temple ground.
**Corrected:** You shouldn’t litter the temple grounds.

10. **Correct:** We should show respect for the monks and the elders.
(No correction needed)

Feel free to ask if you have any further questions!