Carpets from countries such as Persia and Afghanistan often fetch high prices in the United States.
A.Artifacts
B.Pottery
C.Rugs
D.Textiles

Though many scientific breakthroughs have resulted from mishaps,it has taken brilliant thinkers to recognize their potential.
A.accidents
B.misunderstandings
C.incidentals
D.misfortunes

The shop assistant was totally bewildered by the customer's behavior.
A.disgusted
B.puzzled
C.angry
D.upset

He didn't bat an eyelid when he realized he failed the exam again.
A.wasn't happy
B.didn't want to see
C.didn't show surprise
D.didn't care

Ralph Nader was the most prominent leader of the U.S consumer protection movement.
A.casual
B.significant
C.promiscuous
D.aggressive

Tourists today flock to see the two falls that actually constitute Niagara falls.
A. come without knowing what they will see
B.come in large numbers
C.come out of boredom
D.come by plane

Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
A.record
B.shine
C.categorize
D.diversify

She is always diplomatic when she deals with angry students.
A.strict
B.outspoken
C.firm
D.tactful

Roget's Thesaurus, a collection of English words and phrases, was originally arranged by the ideas they express rather than by alphabetical order.
A.restricted
B.as well as
C.as well as
D.instead of

Without this treatment, the patient would have died.
A.If it weren’t for this treatment, the patient would have died.
B.
C.If there wasn’t this treatment, the patient would die.
D.If it hadn’t been for this treatment, the patient would have died.