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: Before the earthquake hit the area,many minor tremors were felt.

A. spasms

B. noises

C. vibrations

D. crumblings

Câu 2: His new yatch is certainly an ostentatious display of his wealth.

A. beautiful

B. showy

C. large

D. expensive

Câu 3: In the 1776 pamphlet "Common Sense," Thomas Paine defended the cause of the American Revolution.

A. fought

B. championed

C. exposed

D. believed

Câu 4: 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 5: The use of lasers in surgery has become relatively commonplace in recent years.

A. absolutely

B. relevantly

C. almost

D. comparatively

Câu 6: He was fired because of his misconduct at the office party.

A. mistake

B. impropriety

C. condition

D. singing