B9 : 

1. X ( An = > A ) 

2. V 

3. V 

4. X ( most = > the most )

 5. X ( a = > an ) 

6. V 

7. V 

8. V 

9. X ( a = > loại ) 

10. V

B10 : 
1. What has Jim recently experienced in Vietnam ?

2. Where do the ethnic minorities in Vietnam often live ?

3. How are there costumes ?

4. Where do they often gather in special occasions ?

5. What does the chief of the community often tell about at the communal house ? 

6. When do the Ethnic people often hold festivals ?

7. Why does the life in mountainous areas is quite difficult ? 

8. How many days does it take to travel from their house to the market in the remote areas ? 

9. What is made life in remote areas so difficult ?

10. How do the local authorities try to help the ethnic minorities.

B11: 

1. 0 

2. the 

3. a

4. the | the 

5. A 

6. 0 | the

7. the 

8. the 

9. 0 

10. The | the