Câu hỏi: The aircraft carrier is indispensable in naval operations against sea or shore based enemies.

A. unique

B. novel

C. exotic

D. vital

Câu 1: The museum dismissed the curator after some of the oldest paintings were damaged.

A. artist

B. cleaner

C. guard

D. director

Câu 2: The 1908 Siberian meteorite explosion brought about considerable depletion of the northern hemisphere's ozone layer.

A. was caused by

B. resulted in

C. brought back

D. was initiated by

Câu 3: We watched as the plane disappeared behind the clouds.

A. melted

B. escaped

C. vanished 

D. perished

Câu 4: Adverse reviews in the New York press may greatly change the prospects of a new Broadway production.

A. subversive

B. additional

C. encouraging

D. unfavorable

Câu 5: His new yatch is certainly an ostentatious display of his wealth.

A. beautiful

B. showy

C. large

D. expensive

Câu 6: In the United States, a party can nominate a single candidate for office.

A. refuse

B. keep

C. change

D. appoint