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

A. Hanging

B. Tentative

C. Increasing

D. Irrefutable

Câu 2: Ralph Nader always speaks out about everything.

A. declares his opinion

B. agrees

C. quarrels

D. has an interest

Câu 3: 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 4: 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 5: Many doctors are still general practitioners, but the tendency is toward specialization in medicine.

A. rumor

B. trend

C. prejudice

D. security

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