B in this version, "exceeding virtually every other immigrant group" is written as a modifier that is modifying "rates of entrepreneurship". therefore, you have a comparison between rates on the one hand and immigrant groups on the other hand -- a nonsense comparison.
C "those" stands for "rates of entrepreneurship", not just "rates"
each组合是独立主格的特殊用法，不加with，详见https://forum.chasedream.com/thread-912286-1-1.html
【转载】RON： if "with ____" is modifying xxxxx, then it should be describing some aspect, or sub-component, of xxxxx.【with表示某物的一部分】 here, "each" = each style of cooking. we can't use "with each style of cooking..." to describe "styles of cooking".【此处不能说styles的一部分，所以不能用with】。
M说some segments支持P，然后做了个假设：if those segments (=前面some指代的所有segments)都支持Q，则没有既支持Q又支持R的。接着S否定了这个假设，也就是并不是所有支持P的都支持Q，说明至少有一个支持P的segment是不支持Q的，也就是至少有一个segment是支持P不支持Q。
C选项，介词后面加名词短语导致核心词是drugs和doctors。如果改为because of the drugs' becoming more expensive and the doctors' having written many more prescriptions for higher-cost drugs, 是否可以看作这个改动将核心词转化成“药物变贵”和“医生开处方”这两件事？
used to pay; went to pay both Ok. used for paying , wrong
Ron: Used for __ing" is more indirect. E.g., My father uses this chair for watching television, but my father uses his eyes to watch television.
A 句子结构，it做形式主语引导了两个并列句，通过and连接。 第二个it只能指代华盛顿期刊，正确。correct
B 第一it 无指代，形式主语表强调，而and连接的后半句并没有用it进行强调。 平行结构错误。错 代词太多请小心
C having won high praise动作发出者应该是华盛顿期刊，having won修饰前面一句话。 错
D 缺少动词， fragment
E moving 开头接，表明moving的动作先发生，即在KG上任后华盛顿期刊先排行第一，再在她的指挥下得奖。
而原文的逻辑是表达 成为行业第一和得奖是并列的关系。 改变逻辑，绝对错误。
E "moving" and "becoming" indicate something that's going on right now - this should be in the past. And "after Katherine Graham's becoming its publisher" is horrible.
That leaves us with A (where the second "it" pronoun is fine, by the way, because both logically and structurally it refers to Wash Post).
E same problem in choice (e), which implies that lake baikal itself is somehow "more than all the North American Great Lakes combined"
A i would certainly like the sentence better if it were written as "... more than DO all the great lakes combined", but, hey, nobody's perfect. there are definitely correct answers that are worse than this one.
A选项it作形式主语，指代“to recover uranium from seawater”，句子核心也是它，可以写成“To recover uranium from seawater may someday be worthwhile to try”，说的是“也许有一天从海水中回收铀是值得一试的”； C项句子核心变成了trying（包括D的to try也是），意思是“试着从海水中回收铀也许有一天是值得的”； 这样比较显然A更合理，谈到平行的话，A的平行更贴切，but从句核心也是the process“从海水中回收铀”和前面对应，前面表语“worthwhile to try”和后面表语"expensive"对应。
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B in this version, "exceeding virtually every other immigrant group" is written as a modifier that is modifying "rates of entrepreneurship". therefore, you have a comparison between rates on the one hand and immigrant groups on the other hand -- a nonsense comparison.
C "those" stands for "rates of entrepreneurship", not just "rates"