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 happier than are people who are living
（E） not as happy as are people who live
31.It may someday be worthwhile to try to recover uranium from seawater， but at present this process is prohibitively expensive.
（A）It may someday be worthwhile to try to recover uranium from seawater
（B）Someday， it may be worthwhile to try and recover uranium from seawater
（C）Trying to recover uranium out of seawater may someday be worthwhile
（D）To try for the recovery of uranium out of seawater may someday be worthwhile
（E）Recovering uranium from seawater may be worthwhile to try to do someday
32. The underlying physica1 principles that control the midair gyrations of divers and gymnasts are the same as the body orientation controlling astronauts in a weightless environment.
（A）as the body orientation controlling
（B）as the body orientation which controls
（C）as those controlling the body orientation of
（D）ones to control the body orientation of
（E）ones used in controlling the body orientation of
33.The spraying of pesticides can be carefully planned， but accidents， weather conditions that could not be foreseen， and pilot errors often cause much larger deposits of spray than they had anticipated.
（A）weather conditions that could not be foreseen，and pilot errors often cause much larger deposits of spray than they had
（B）weather conditions that cannot be foreseen， and pilot errors often cause much larger deposits of spray than
（C）unforeseeable weather conditions， and pilot errors are the cause of much larger deposits of spray than they had
（D）weather conditions that are not foreseeable，and pilot errors often cause much larger deposits of spray than
（E）unforeseeable weather conditions， and pilot errors often cause much larger deposits of spray than they had
（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 happier than are people who are living
（E） not as happy as are people who live
31.It may someday be worthwhile to try to recover uranium from seawater， but at present this process is prohibitively expensive.
（A）It may someday be worthwhile to try to recover uranium from seawater
（B）Someday， it may be worthwhile to try and recover uranium from seawater
（C）Trying to recover uranium out of seawater may someday be worthwhile
（D）To try for the recovery of uranium out of seawater may someday be worthwhile
（E）Recovering uranium from seawater may be worthwhile to try to do someday
32. The underlying physica1 principles that control the midair gyrations of divers and gymnasts are the same as the body orientation controlling astronauts in a weightless environment.
（A）as the body orientation controlling
（B）as the body orientation which controls
（C）as those controlling the body orientation of
（D）ones to control the body orientation of
（E）ones used in controlling the body orientation of
33.The spraying of pesticides can be carefully planned， but accidents， weather conditions that could not be foreseen， and pilot errors often cause much larger deposits of spray than they had anticipated.
（A）weather conditions that could not be foreseen，and pilot errors often cause much larger deposits of spray than they had
（B）weather conditions that cannot be foreseen， and pilot errors often cause much larger deposits of spray than
（C）unforeseeable weather conditions， and pilot errors are the cause of much larger deposits of spray than they had
（D）weather conditions that are not foreseeable，and pilot errors often cause much larger deposits of spray than
（E）unforeseeable weather conditions， and pilot errors often cause much larger deposits of spray than they had