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9/
1. an -> a
2. the -> an
3. a -> the
4. most -> the most
5. Đúng

6. an -> a
7. Đúng
8. Đúng
9. a -> x
10. Đúng

10/
1. What has Jim recently experienced in Vietnam?
2. Where do the ethnic minorities in Vietnam often live?
3. How are their costumes?
4. Where do they often gather together in special occasions?
5. What does the chief of the community often do at the communal house?
6. When do ethnic people often hold festivals?
7. Why is life in the mountainous areas difficult?
8. How long mayit take people to trael from their house to the market in the remote areas?
9. What makes life in remote areas so difficult?
10. How do the local authorities try to help the ethnic minorities?

11/
1. x
2. the
3. a
4. the/the
5. x
6. a/x
7. a

IX,
1. an → a

2. the → an

3. a → the

4. most → the most

5. Ф

6. an → a

7. Ф

8. Ф

9. a → x

10.Ф

X,
1.

What has Jim recently experienced in Vietnam?
2.

Where do the ethnic minorities in Vietnam often live?
3.

How are their costumes?
4.

Where do they often gather together in special occasions?
5.

What does the chief of the community often do at the communal house?
6.

When do ethnic people often hold festivals?
7.

Why is life in the mountainous areas difficult?
8.

How long mayit take people to trael from their house to the market in the remote areas?
9.

What makes life in remote areas so difficult?
10.

How do the local authorities try to help the ethnic minorities?

XI,

1. Ф
2. the
3. a
4. the
5. Ф
6. a 
7. a

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