855补充

老螃蟹

29.    Building large 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 grounds of avoiding duplicated facilities alone
(C) solely in that duplicated facilities should be avoided
(D) while the duplication of facilities should be avoided
(E) if only because the duplication of facilities should be avoided
为啥b不对

老螃蟹

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
我觉得c也对

老螃蟹

34.    To read of Abigail Adams’ lengthy separation from her family, her difficult travels, and her constant battles with illness is to feel intensely how harsh life was even for the so-called aristocracy of Revolutionary times.
(A) To read of
(B) Reading about
(C) Having read about
(D) Once one reads of
(E) To have read of
这题虽然对答案没有质疑，但是read of 是个什么用法？

老螃蟹

37.    Seeming to be the only organization fighting for the rights of poor people in the South, Hosea Hudson, a laborer in Alabama, joined the Communist party in 1931.
(A) Seeming to be
(B) As
(C) In that they seemed
(D) Since it seemed
(E) Because it seemed to be
a为什么不对？

老螃蟹

41.    Since chromosome damage may be caused by viral infections, medical x-rays, and exposure to sunlight, it is important that the chromosomes of a population to be tested for chemically induced damage be compared with those of a control population.
(A) to be tested for chemically induced damage be compared with
(B) being tested for damage induced chemically are compared with
(C) being tested for chemically induced damage should be compared to
(D) being tested for chemically induced damage are to be compared to
(E) that is to be tested for chemically induced damage are to be comparable with
important后面也要用虚拟语气？

老螃蟹

up

老螃蟹

45.    If industrial pollution continues to deplete the ozone layer, the resulting increase in ultraviolet radiation will endanger human health, causing a rise in the incidence of skin cancer and eye disease, and perhaps even threatening global ecological systems.
(A) and perhaps even threatening
(B) and may even threaten
(C) and even a possible threat to
(D) as well as possibly threatening
(E) as well as a possible threat to
threaten和endanger平行？

gemj

45
是的，threaten是动词原形。

gemj

37
Seeming的逻辑主语是Hosea Hudson

dullpen

29. on the grouds for 习惯搭配
31.(C) Trying to recover uranium out of seawater may someday be worthwhile
recover sth from 习惯搭配;表示一个process或是practice，用动词不定式较为常见

37.Seeming to be的话，就是说这个人是the only organization，指代不一致

41.是

45.threaten和endanger平行。这个句子很典型。do A1, doing b1, and do A2
b1是A1的后果或是补充，主体结构上看A1和A2平行，很多人容易认为是三个平行。再次说明理解句意很重要！