Sure, let's go through each exercise step by step.

### Ex1: Chọn đáp án đúng nhất:

1. Is **there** a post office near here, Madam?
- A.this B.that C.there D.It
- **Correct Answer: C. there**

2. Could you please tell me **how** to get to the nearest hospital?
- A.where B.how C.which D.what
- **Correct Answer: B. how**

3. The souvenir shop is **between** a toyshop and a movie theater.
- A.through B.between C.middle D.at
- **Correct Answer: B. between**

4. How **far** is it from your house to the post office?
- A.long B.much C.far D.many
- **Correct Answer: C. far**

5. How **often** do you call home? - Twice a week.
- A.often B.much C.many D.time
- **Correct Answer: A. often**

6. What subjects does he **study** at school?
- A.studies B.study C.to study D.studying
- **Correct Answer: B. study**

7. **Which** subject does he like best?
- A.Which B.What C.How D.Who
- **Correct Answer: A. Which**

8. His favorite subject **is** Physics.
- A.be B.is C.are D.will be
- **Correct Answer: B. is**

9. My brother is also very interested **in** computers.
- A.at B.on C.in D.of
- **Correct Answer: C. in**

10. In Physics, he **does** some experiments.
- A.does B.do C.to do D.doing
- **Correct Answer: A. does**

### Ex 2: Tìm lỗi sai:

1. **Let's go to the restaurant have some food.**
- **Error:** D (have)
- **Correction:** Let's go to the restaurant **to have** some food.

2. **Would you like go to the movies with me?**
- **Error:** C (go)
- **Correction:** Would you like **to go** to the movies with me?

3. **What does he often do in evening?**
- **Error:** D (in evening)
- **Correction:** What does he often do **in the evening**?

4. **Who should I invite in my brother's wedding party?**
- **Error:** D (in)
- **Correction:** Who should I invite **to** my brother's wedding party?

5. **How do your farther travel to work every day?**
- **Error:** B (do)
- **Correction:** How **does** your father travel to work every day?

I hope this helps! Let me know if you need any further assistance.