The Muong are well-known for the _______of their traditional songs.

A. rich

B. richness

C. enrich

D. enrichness

7. The exhibition shows the_______ of different cultural groups.

A. diverse

B. diversification

C. diversity

D. diversifying

8. There are always regional _______in every country.

A. different

B. differences

C. differ

D. differential

9. You shrug your shoulders means: “_______”.

A. I’m hungry.

B. I don’t know.

C. I’m angry.

D. Sorry, I need to go now.

10. _______  Global communication was changed by the     of the Internet.

A. inventors

B. invention

C. invent

D. invented

11.Australia is a/an_______ country what the planet Earth will be like in 100 years’ time.

A. exceptional

B. unique'

C. scenic

D. iconic

12. Using music, codes, or signs to communicate is called _______ communication.

A. verbal

B. non-verbal

C. public

D. non-public

13.Vietnam is a/an________ country with 54 ethnic groups.

A. ethnic

B. multi-cultural

C. bi-lingual

D. bi-cultural

14. We cannot prevent natural disasters, but we can_______ for them.

A. struggle

B. defeat

C. prepare

D. invent

15.Air pollution, together with littering has________ many problems in our large cities today.

A. caused

B. bought

C. made

D. affected