Câu hỏi: The _______ by UN troops prevented fighting from breaking out.

A. participant

B. intervention

C. joiner

D. contestant

Câu 1: He had a new heart valve _______.

A. added

B. supplanted

C. improved

D. implanted

Câu 2: You need to_______ the numbers properly in a column.

A. align

B. check

C. draw

D. write

Câu 3: The society was set up to______ endangered species from extinction.

A. prevent

B. distinguish

C. preserve

D. survive

Câu 4: Do you know the country which you has the hightest life_______ in the world?

A. expectancy

B. objective

C. desire

D. ambition

Câu 5: All the _______had excellent academic credentials.

A. candidates

B. goverments

C. followers

D. desigers

Câu 6: The_______ of living here, of course, is that it is expensive.

A. glorious

B. athletic

C. strategy

D. downside