（A）as well as the chilling effects of terrorist activity that is persistent
（B）and the cm11ing effect of terrorist activity that is persistent
（C）but persistent terrorist activity has had a chilling effect too
（D）and the chilling effects of persistent terrorist activity
（E）as well as the chilling effects of terrorist of terrorist activity that persists
26. Opening with tributes to jazz-age divas like Bessie smith and closing with Koko Taylor's electrified gravel-and-thunder songs，the program will trace the blues' vigorous matriarchal line over more than 50 years.
（A）the program will trace
（B）the program s6a11 trace
（C）there will be a program tracing
（D）it is a program that traces
（E） it will be a program tracing
27. In 1929 relatively small declines in the market ruined many speculators having bought on margin； they had to sell， and their selling pushed other investors to the brink.
（A）specu1ators having bought on margin； they had to sell，and
（B）specu1ators who had bought on margin； having had to sell，
（C）speculators who had bought on margin； they had to sell， and
（D）specu1ators， those who bad bought on margin；these speculators had to sell， and
（E）speculators， who， having bought on margin and having to sel1，
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28. The mistakes children make in learning to speak tell linguists more about how they learn language than the correct forms they use.
（A） how they learn language than
（B） how one learns language than
（C） how children learn language than do
（D） learning language than
（E） their language learning than do
29. Building 1arge new hospitals in the bistate area would constitute a wasteful use of resources， on the basis of avoidance of duplicated facilities alone.
（A）on the basis of avoidance of duplicated facilities alone
（B）on the grot1nds of avoiding duplicated facilities alone
（C）solely in that duplicated facilities should be avoided
（D）whi1e the duplication of facilities should be avoided
（E）if on1y because the duplication of facilities should be avoided
30. Freedman's survey showed that people living in small towns and rural areas consider themselves no happier than do people living in big cities.
（A） no happier than do people living
（B） not any happier than do people living
（C） not any happier than do people who live
（D） no happie
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