12 Since the 1930's aircraft manufacturers have tried to build airplanes with frictionless wings, shaped so smoothly and perfectly that the air passing over them would not become turbulent.
(A) wings, shaped so smoothly and perfectly
(B) wings, wings so smooth and so perfectly shaped
(C) wings that are shaped so smooth and perfect
(D) wings, shaped in such a smooth and perfect manner
(E) wings, wings having been shaped smoothly and perfectly so

13. Some biographers have not only disputed the common notion that Edgar Allan Poe drank to
excess but also questioned whether he drank at all.
(A) have not only disputed the common notion that Edgar Allan Poe drank to excess but also
questioned whether he drank
(B) not only have disputed the common notion that Edgar Allan Poe drank to excess but also
over whether he drank
(C) have disputed not only the common notion that Edgar Allan Poe drank to excess but also
whether he may not have drunk
(D) not only have disputed the common notion that Edgar Allan Poe drank to excess but also
questioned whether or not he had drunk

(E) have disputed the common notion not only that Edgar Allan Poe drank to excess but also
questioned whether he may not have drunk

14. According to Interstudy, a nonprofit organization that studies health maintenance organizations
(HMO's), they estimate that, in comparison to last year, when only 36 percent of the nation's 607 HMO's was profitable, this year 73 percent will be.
(A) they estimate that, in comparison to last year, when only 36 percent of the nation's 607 HMO's was profitable, this year 73 percent will be
(B) compared to only 36 percent of the nation's 607 HMO's being profitable last year, they estimate 73 percent would be this year
(C) only 36 percent of the nation's 607 HMO's were profitable last year; it estimates that this year 73 percent will be
(D) it estimates 73 percent of the nation's 607 HMO's would be profitable this year; last
year that was only 36 percent
(E) only 36 percent of the nation's 607 HMO's last year were profitable, whereas they estimate it this year to be 73 percent

15. The visiting pharmacologists concluded that the present amalgam of Chinese and Western medicine is probably as good, or better than, any system that might be devised for the patients who are treated at the Nan Kai hospital in Tian-jing.
(A) as good, or better than, any system that might be devised for the patients who are
(B) as good, or better, than any system that might be devised for patients being
(C) as good, or better than, any system that might be devised for patients which are being
(D) good as, or even better than, any other system that may be devised for the patients who are
(E) as good as, or better than, any other system that might be devised for the patients

16. One of four babies are now born to mothers aged thirty years or more, compared with just one of six born in 1975.
(A) of four babies are now born to mothers aged thirty years or more, compared with just one
of six born
(B) of four babies is now born to a mother whose age is thirty of older, compared to just one of six babies who were born
(C) baby in four are now born to mothers aged thirty or older, compared to just one in six
(D) baby in four is now born to a mother aged thirty or older, compared with just one in six
(E) baby in four is now born to mothers aged thirty years or more, compared to just one in six

17. School desegregation has worked well in Buffalo, New York, in part because parents and teachers were given major roles in designing the city's magnet schools, because extra federal funds were allocated to make each school unique, and because the federal judge enforced desegregation orders.

(A) because extra federal funds were allocated to make each school unique
(B) because of the allocation of extra federal funds that make each school unique
(C) because each school is made unique by allocating it extra federal funds
(D) extra federal funds were allocated in order to make each school unique
(E) extra federal funds were allocated for making each school unique

18. Among the Cossacks, vegetable farming was once so despised that it was forbidden on pain of
death.
(A) so despised that it was
(B) so despised to be
(C) so despised it had been
(D) despised enough that it was
(E) despised enough as to be

19 Researchers have questioned the use of costly and experimental diagnostic tests to identify food allergies, such as milk, that supposedly disrupt normal behavior.
(A) to identify food allergies, such as
(B) to identify food allergies, like
(C) to identify food allergies, such as to
(D) for identifying food allergies, like that of
(E) for identifying food allergies, such as for

20 Biologists believe that they have found one of the substances that tell individual genes both when to become active and when to remain quiescent in the earliest phases of an embryo's development.
(A) tell individual genes both when to become active and when to remain
(B) tell individual genes both at which time they should become active or should remain
(C) tells individual genes both when to become active or remain
(D) tells individual genes both when to become active or when to remain
(E) will tell an individual gene both about when it should become active and remain

21 Unlike the lives of Pushkin, Gogol, Tolstoi, and Dostoevski, subjects of other Troyat biographies, Chekhov belongs to the twentieth century, an age of fretfulness and melancholy skepticism.
(A) Unlike the lives of Pushkin, Gogol, Tolstoi, and Dostoevski, subjects of other Troyat biographies, Chekhov belongs
(B) Chekhov, unlike the other Troyat biographies of Pushkin, Gogol, Tolstoi, and Dostoevski, belongs
(C) The life of Chekhov, unlike the lives of the subjects of other Troyat biographies, Pushkin, Gogol, Tolstoi, and Dostoevski, belongs
(D) Chekhov and his life, unlike that of the other Troyat biographies--- Pushkin, Gogol, Tolstoi, and Dostoevski, belong

(E) The life of Chekhov, unlike that of other Troyat biographies of Pushkin, Gogol, Tolstoi, and Dostoevski, belongs

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