16. Migraine， the most debilitating common form of headache， afflicts perhaps 18 million Americans，
who collectively lose 64 million workdays a year， and they cost the nation $50 billion in medical
expenses and lost work time.
（A） year， and they cost the nation $50 billion in medical expenses and lost
（B） year and thus cost the nation $50 billion in medical expenses and lost
（C） year， so as to cost the nation $50 billion in medical expenses and lost
（D） year that costs the nation $50 billion in lost medical expenses and
（E） year， which thus cost the nation $50 billion in lost medical expenses and
17. Like many others of his generation of Native American leaders， Joseph Brant lived in two worlds；
born into an Iroquois community and instructed in traditional Iroquois ways， he also received an
education from English-speaking teachers.
（A） Like many others of his generation of Native American leaders， Joseph Brant lived in two worlds；
（B） Like many others of his generation of Native American leaders， living in two worlds， Joseph
Brant was
（C） Like many another of his generation of Native American leaders， Joseph Brant， living in two
worlds， was
（D） As with many others of his generation of Native American leaders， living in two worlds， Joseph
Brant was
（E） As with many another of his generation of Native American leaders， Joseph Brant lived in
two worlds；
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18. Sales of United States manufactured goods to nonindustrialized countries rose to $167 billion in 1992， which is 14 percent more than the previous year and largely offsets weak demand from Europe and Japan.
（A） which is 14 percent more than the previous year
（B） which is 14 percent higher than it was the previous year
（C） 14 percent higher than the previous year's figure
（D） an amount that is 14 percent more than the previous year was
（E） an amount that is 14 percent higher than the previous year's figure
19. All-terrain vehicles have allowed vacationers to reach many previously inaccessible areas， but they have also been blamed for causing hundreds of deaths， injury to thousands， and seriously damaging the nation's recreational areas.
（A） deaths， injury to thousands， and seriously damaging
（B） deaths and injuring thousands， and serious damage to
（C） deaths， thousands who are injured， as well as seriously damaging
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