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: 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 2: You can’t stop smoking immediately. Just try to …….. a little.

A. go on

B. give up

C. keep

D. delete

Câu 3: 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

Câu 4: It is crucial that urban people not look down on rural areas.

A. evil

B. optional

C. unnecessary

D. vital

Câu 5: Although Brenda came last, everyone agreed she had ________ her best.

A. had

B. got

C. done

D. made

Câu 6: It isn't ____ for him to take charge of the financial burden on his family.

A. boring

B. expensive

C. easy

D. mind