Câu hỏi: Primary education in the United States is compulsory

A. free of charge

B. required

C. excellent

D. easy

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

A. exquisite

B. sporadic

C. treacherous

D. aloof

Câu 3: The new amphitheater was based on the ancient Greek design.

A. underwater theater

B. oval theater

C. sound and light theater 

D. mini-theater

Câu 4: Mounting evidence indicates that acid rain is damaging historic sites in Boston and Philadelphia.

A. Hanging

B. Tentative

C. Increasing

D. Irrefutable

Câu 5: Ralph Nader always speaks out about everything.

A. declares his opinion

B. agrees

C. quarrels

D. has an interest

Câu 6: 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