Here are the corrections for each sentence including the mistakes underlined:

1. **You can’t drive because you are old enough.**
**Mistake: old enough**
**Correction: not old enough**
**Corrected sentence: You can’t drive because you are **not old enough.**

2. **Why don’t she help her mother after school?**
**Mistake: don’t**
**Correction: doesn’t**
**Corrected sentence: Why **doesn’t** she help her mother after school?**

3. **You shouldn’t go fast so it’s very dangerous.**
**Mistake: go fast**
**Correction: go fast.**
**Corrected sentence: You shouldn’t go fast**, **because it’s very dangerous.**

4. **They usually wash his face twice a day.**
**Mistake: his**
**Correction: their**
**Corrected sentence: They usually wash **their** face twice a day.**

5. **My sister has an terrible headache.**
**Mistake: an**
**Correction: a**
**Corrected sentence: My sister has **a** terrible headache.**

6. **My sisters isn’t going to the cinema tonight.**
**Mistake: isn’t**
**Correction: aren’t**
**Corrected sentence: My **sisters aren’t** going to the cinema tonight.**

7. **Where did you do yesterday?**
**Mistake: do**
**Correction: go**
**Corrected sentence: Where did you **go** yesterday?**

8. **He usually late for school.**
**Mistake: late**
**Correction: is**
**Corrected sentence: He **is usually late** for school.**

9. **He plays soccer over there, with his friends.**
**Mistake: comma**
**Correction: Remove comma**
**Corrected sentence: He plays soccer over there** **with his friends.**

10. **My Mum not travel to Hanoi tomorrow.**
**Mistake: not**
**Correction: does not**
**Corrected sentence: My Mum **does not** travel to Hanoi tomorrow.**

---

**VII. Circle the correct answer.**

1. They live **happily** forever.
2. Is he **an** honest man?
3. A long time ago, there **was** a fox and a crow.
4. He **gave** her a bunch of flowers yesterday.
5. One day, King Hung became **angry** with Mai An Tiem.
6. She **reads** books every day.