| a. interpret
b. read
c. understand
d. translate
15. I warned him to keep the matter confidential.（机密的，秘密的）
a. private
b. safe
c. personal
d. secret
家庭作业：马上再看一遍，及时掌握、巩固所学词汇并理解句意。
1.All living organisms, regardless of their unique identity, have certain biological, chemical, and physical characteristics in common.
a. as a result of
b. considering
c. on purpose
d. whatever
2.The most pressing problem any economic system faces is how to use its scarce resources.
a. puzzling
b. difficult
c. terrifying
d. urgent
3.The Klondike was the scene of one of the biggest gold rushes the world has ever known.
a. location
b. view
c. event
d. landscape
4.Of the reptile groups, the snake group was the final one to appear.
a. last
b. best
c. ugliest
d. longest
5.Colleges and universities usually give diplomas or certificates to students who complete course requirements satisfactorily.
a. responsibly
b. acceptably
c. patiently
d. respectfully
6.A will is a document written to ensure that the wishes of the deceased are realized.
a. fulfilled
b. affiliated
c. advocated
d. received
7.She has been the subject of massive media coverage.
a. extensive
b. negative
c. responsive
d. explosive