一、单项选择题。
1.A deadly disease has affected these animals.
A. contagious
B. serious
C. fatal
D. worrying
2.America's emphasis on the importance of education for every one has spurred scientific research.
A. encouraged
B. endangered
C. endorsed
D. enlarged
3.In 1861, it seemed inevitable that the Southern states would break away from the Union.
A. strange
B. certain
C. inconsistent
D. proper
4.Even in a highly modernized country, manual work is still needed.
A. expressive
B. physical
C. exaggerated
D. dubious
5.John is collaborating with Mary in writing a book.
A. cooperating
B. merging
C. combining
D. associating
6.When she was invited to the party, she readily accepted.
A. willingly
B. merging
C. combining
D. associating
7.I rarely wear a raincoat because I spend most of my time in a car.
A. normally
B. seldom
C. continuously
D. usually
8.Practically all species of animals communicate either through sounds or through soundless codes.
A. Simultaneously
B. Almost
C. Absolutely
D. Basically
9.I suppose he will give in eventually.
A. in a way
B. in due course
C. in the end
D. in any case
10.Don't get upset about trivial matters.
A. unexpected
B. unusual
C. unimportant
D. uncertain
11.The child couldn't comprehend the profound textbook.
A. interpret
B. read
C. understand
D. translate
12.The steadily rising cost of labor has greatly increased merchandise's prices.
A. continuously
B. quickly
C. excessively
D. exceptionally
13.Mary was compelled to take in washing to help support her family.
A. pleaded
B. appealed
C. forced
D. instructed
14.I warned him to keep the matter confidential.
A. private
B. safe
C. personal
D. secret
15.Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour.
A. velocities
B. impulses
C. ratios
D. percentage
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