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: Many doctors are still general practitioners, but the tendency is toward specialization in medicine.

A. rumor

B. trend

C. prejudice

D. security

Câu 2: Ralph Nader always speaks out about everything.

A. declares his opinion

B. agrees

C. quarrels

D. has an interest

Câu 3: 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 4: In the 1960's the upper level of Pennsylvania Station in New York City was torn down and replaced by Madison Square Garden.

A. detracted

B. demoted

C. distended

D. dismantled

Câu 5: Primary education in the United States is compulsory

A. free of charge

B. required

C. excellent

D. easy

Câu 6: 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