【求助】Prep的几道语法题

andizza

做了prep，有几道语法题不太清楚为什么，不知道有没有人能帮我讲解一下，谢谢。

The success of the program to eradicate smallpox has stimulated experts to pursue what they had not previously considered possible - better control, if not eradication, of the other infections such as measles and yaws.
A what they had not previously considered possible better control, if not eradication, of the other infections such as
B what they had not previously considered a possibility--better control, if not eradication, of such infections like
C something they had not previously considered possible-better control, if not eradication, of such infections as
D something not considered a previous possibility-better control and perhaps eradication, of other infections such as
E the possibility of what they had not previously considered better control and possibly eradication of infections like
正确答案是C，我选了D。是因为语义不对么？

Unlike most severance packages, which require workers to stay until the last day scheduled to collect, workers at the automobile company are eligible for its severance package even if they find a new job before they are terminated
A the last day scheduled to collect, workers at the automobile company are eligible for its severance package
B the last day they are scheduled to collect workers are eligible for the automobile company's severance package
C their last scheduled day to collect, the automobile company offers its severance package to workers
D their last scheduled day in order to collect, the automobile company's severance package is available to workers
E the last day that they are scheduled to collect, the automobile company's severance package is available to workers
这道题A B C明显不对，我选了E，正确答案是D。求说明。

When drive-ins were at the height of their popularity in the late 1950s, some 4,000 existed in the United States, but today there are less than one-quarter that many.
A there are less than one-quarter that many
B there are fewer than one-quarter as many
C there are fewer than one-quarter of that amount
D the number is less than one-quarter the amount
E it is less than one-quarter of that amount
正确答案是B，我选了C。求解释。

With surface temperatures estimated at minus 230 degrees Fahrenheit, jupiter's moon Europa has long been considered far too cold to support life, and with 60 square miles of water thought to be frozen from top to bottom.
A Europa has long been considered far too cold to support life, and with
B Europa has long been considered far too cold to support life, its
C Europa has long been considered as far too cold to support life at
D Europa, long considered as far too cold to support life, and its
E Europa, long considered to be far too cold to support life, and to have
正确是B，我选了C。是因为consider as的问题么？

以上四题。谢谢。

iamxixi9

第一题
1、选D sth 后面的那一坨都是修饰sth的，显然结构有问题，
2、D中 other infection , other是没有指代对象的，前文没有出现infection。
3、通过读句子能判断出来  if not eradication 做插入语的形式更好

第二题
the last day that they are scheduled to collect , 后面的从句有 collect day的意思。

第三题
As many 是个用法，指代前面出现的数字。你错选的选项 that amount没指代对象。

第四题
consider as 是个问题
更重要的是你没有理解这句话要表达的意思

its 60 square miles of water thought to be frozen from top to bottom, 是 absolute phrase的用法，用来说明冷的程度。