Câu hỏi: 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 1: The activists were accused of contaminating the minds of our young people.

A. providing healthy ideas

B. harming

C. nurturing

D. keeping in the dark

Câu 2: Primary education in the United States is compulsory

A. free of charge

B. required

C. excellent

D. easy

Câu 3: Mounting evidence indicates that acid rain is damaging historic sites in Boston and Philadelphia.

A. Hanging

B. Tentative

C. Increasing

D. Irrefutable

Câu 4: John was not promoted because his work did not meet the manager's expectations.

A. anticipations

B. expenditures

C. expertise

D. gaudiness

Câu 5: 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 6: Relaxation therapy teaches one not to fret over small problems.

A. worry about

B. get angry about

C. get involved in

D. look for