Câu hỏi: These projects have proved to be very effective in dealing with global climate change, which was considered an insoluble problem in the first 30 years of this century.

A. hard

B. challenging

C. unsolvable

D. unbearable

Câu 1: It is crucial that urban people not look down on rural areas.

A. evil

B. optional

C. unnecessary

D. vital

Câu 2: With the dawn of space exploration, the notion that atmospheric conditions on Earth may be unique in the solar system was strengthened.

A. outcome

B. continuation

C. beginning

D. expansion

Câu 3: Although Brenda came last, everyone agreed she had ________ her best.

A. had

B. got

C. done

D. made

Câu 4: People who hold optimistic view believe that cities of the future will increase the general well-being of individuals and societies.

A. health state

B. quality of life

C. level of development

D. growth rate

Câu 5: The average, ________watches television for about 15 hours a week.

A. spectator

B. observer

C. audience

D. viewer

Câu 6: There's a real mix of people in Brighton. It has a very cosmopolitan feel to it.

A. busy

B. hectic

C. multi-cultural

D. diversified