Câu hỏi: 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 1: The blank space of the paper must be 1.5 inches at the top and 1 inch at the bottom and on the sides.

A. frames

B. borders

C. shutters

D. margins

Câu 2: 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 3: Primary education in the United States is compulsory

A. free of charge

B. required

C. excellent

D. easy

Câu 4: Peter didn’t mean to be disrespectful to his teacher. He just couldn’t control his temper.

A. Showing lack of trust

B. showing impolite behavior

C. Showing nervousness

D. showing lack of attention

Câu 5: 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 6: Ralph Nader always speaks out about everything.

A. declares his opinion

B. agrees

C. quarrels

D. has an interest