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.

She helped us a lot with our project. We couldn’t continue without her.
A.Provided her contribution wouldn’t come, we could have continued with the project.
B.Unless we had her contribution, we couldn’t have continued with project.
C.But for her contribution, we could have continued with the project.
D.

He was asked to account for his presence at the scene of crime.
A.complain
B.exchange
C.explain
D.arrange