1. When does Minh usually take exercises?
2.  How often do you brush your teeth?
3. What time does Nga have an appointment this morning?
4. Where do they live?
5.  Why do you like Tom and Jerry?

6.  How is she feel about the next examinatuion?

7. What makes people different from all other animals?

8.  When do they do their homework?
9. Which blouse do you want?

10.  What is that?

11. Where does he study piano?
12. What's your father job?

13. Who is your favorite musician?

14. How often do you take holiday?
15. How long does it take to get there?
16. What does he earn a week?
17. How much is this book?

18.  How is the price of the car?

Exercise 5
1. Although

2.  so

3.  but 

4. so

5. because

6.  but

exercise 6

1. She's in hospital because she had an accident.

2.  They work many hours but they don't have much money.

3. Paul asked me a question so I replied.

4. I buy tomatoes, peppers and potatoes.

5.  She can have an apple or a mango, but she can't have both of them.

6.  Karthik can play the piano (violin, chọn cái nào cũng được), but he can't play the violin ( hoặc piano).

7.  She is hard-working but her brother is lazy. 

8.  She is clever and beautiful. 

9.  You can take the blue shirt or the green shirt.  (có thể đổi được)

10.  My sister is tall but I am short.  (đề sai chính tả talk -->tall).

exercise 7 (cái này đặt though, even though hoặc although ở chỗ dấu chấm, vì đều mang chung  nghĩa)