Câu hỏi: Scientists warn of the impending extinction of many species of plants and animals.

A. irrefutable

B. imminent

C. formidable

D. absolute

Câu 1: Hypertension is one of the most widespread and potential dangerous diseases.

A. colossal

B. popular

C. common

D. scattered

Câu 2: In Benjamin Franklin's almanac, he warns against making hasty decisions.

A. expensive

B. unhealthy

C. firm

D. quick

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

A. spasms

B. noises

C. vibrations

D. crumblings

Câu 5: We watched as the plane disappeared behind the clouds.

A. melted

B. escaped

C. vanished 

D. perished

Câu 6: In the 1776 pamphlet "Common Sense," Thomas Paine defended the cause of the American Revolution.

A. fought

B. championed

C. exposed

D. believed