Câu hỏi: The copperhead, a snake that strikes without warning, is considered more dangerous than the rattlesnake.

A. exquisite

B. sporadic

C. treacherous

D. aloof

Câu 1: Though many scientific breakthroughs have resulted from mishaps, it has taken brilliant thinkers to recognize their potential.

A. misunderstandings

B. accidents

C. misfortunes

D. incidentals

Câu 2: Ralph Nader always speaks out about everything.

A. declares his opinion

B. agrees

C. quarrels

D. has an interest

Câu 3: The fer-de-lance, a kind of viper, is one of the most poisonous snakes.

A. deadly

B. vicious

C. bad tasting

D. unhealthy

Câu 4: In the early days of baseball, the game was played by young men of means and social position.

A. with skill

B. with equipment

C. with money

D. with ambition

Câu 5: Proximity to the court house makes an office building more valuable.

A. Interest in

B. Similarity to

C. Nearness to

D. Usefulness for

Câu 6: Primary education in the United States is compulsory

A. free of charge

B. required

C. excellent

D. easy