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