Câu hỏi: 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 1: Now I understand why you moved out of that house.

A. I am surprised

B. it frustrates me

C. I am intrigued

D. it makes sense to me

Câu 2: The museum dismissed the curator after some of the oldest paintings were damaged.

A. artist

B. cleaner

C. guard

D. director

Câu 3: Helen Keller, blind and deaf from an early age, developed her sense of smell so finely that she could identify friends by their personal odors.

A. classify

B. recognize

C. describe

D. communicate with

Câu 4: In the United States, a party can nominate a single candidate for office.

A. refuse

B. keep

C. change

D. appoint

Câu 5: In the 1776 pamphlet "Common Sense," Thomas Paine defended the cause of the American Revolution.

A. fought

B. championed

C. exposed

D. believed

Câu 6: He was asked to account for his presence at the scene of crime.

A. complain

B. exchange

C. explain

D. arrange