16. Although Christopher Columbus failed in his (A) original goal, the discoveries(B) hedid make were as(C) Important than the route to Asia he expected(D) to find.1. _________ a major role in future planetary exploration.
A.Robots will surely play
(B)Robots, which will surely play
(C)Because robots will surely be playing
D.Surely robots, which will be playing2. Unlike the owl, bats cannot see very well, but they do have_________.
A.it hears very well
(B)very good to hear
(C)tearing very well
D.very good hearing3.Comparatively few clues in the United Slates have competing newspapers today, a major change from 1900 _________ more than two newspapers.
A.because then most large cities having
(B)when did most large cities have
(C)then most large cities that had
D.when most large cities had4.Witch hazel extract, _________ distilled from the bark and twigs of the witch hazel shrub, has been utilized in medicine.
A.is
B.when to be
(C)which is
D.has been5. _________ touching in O. Henry’s stories is the gallantry with which ordinary people struggle to maintain their dignity.
A.Most is
B.It mostly is
C.Is it most
D.What is most6. The face of the Moon is changed by collisions with meteoroids, _________ new craters to appear.
A.cause
B.causing
C.caused
D.have cause7. Social scientists believe that _________ from sounds such as grunts and barks made by early ancestors of human beings.
A.the very slow development of language
B.language developed very slowly
C.language which,, was very slow to develop
D.language, very slowly developing8. _________ substances include various forms of silica, pumice, and emery.
A.Natural abrasives occur
B.Abrasion occurs in natural
C.Naturally occurring abrasive
D.A natural occurrence of abrasion9. _________ in the upper part of their long1 thin legs all9w deer to run swiftly and jump far.
A.Muscles are powerful
B.There are powerful muscles
C.The powerful muscles that
D.Powerful muscles10. Geophysicists have collaborated with archaeologists and anthropologists to study the magnetic properties of pottery and fireplaces at sites _________-- by early humans.
A.occupied
B.occupying
C.which occupy
D.were occupied11. _________ technically proficient; it also explores psychological questions.
A.Not only is Barbara Astman’s artwork
B.Not only Barbara Asiman’s artwork
C.Barbara Astman1s artwork,, which is not only
D.Barbara Astman’s artwork not only12. Although Canada’s Parliament can n
either administer or enforce laws initiate policy, it does have the power to make laws and vote on the allocation of funds.
A.not
B.nor
C.a(chǎn)nd
D.either13. Willa Cather considered her novel of life in nineteenth-century Nebraska, My Antonia,_________
A.was her best work
B.her best work
C.her best work it was
D.being her best work14.First designated in 1970, Earth Day has become an annual international event concerns about environmental issues such as pollution.
A.dedicated to raising
B.dedicated raising
C.dedicates to raise
D.that dedicates to raising15. In 1992 Albert Gore, Jr., the son of a former United States senator, became Vice President of the United States.
A.who was the forty-fifth
B.a(chǎn)nd the forty-fifth
C.the forty-fifth
D.he was the forty-fifth
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