Everything from THAT to WORKERS is modifying the noun INDUSTRIES. So what do we have? Industries THAT x and THAT y. What are our x and y?
x = ARE clean and fast-growing
y = PAY good wages

Since clean and fast-growing are adjectives, while pay is a verb, we need a way to provide all of these traits without trying to make them parallel items in one list. So we have the verb ARE to introduce the adjectives, and the verb PAY to make the last point.

A and E: shaped SMOOTHLY
smoothly means performed WITHOUT DIFFICULTY.
Thus, shaped smoothly means shaped WITHOUT DIFFICULTY, implying that the process of shaping the wings is easy.
Not the intended meaning.
The intended meaning is not that the shaping PROCESS is smooth but that the WINGS themselves are SMOOTH.
Eliminate A and E.

C: are shaped so smooth and perfect
Here, smooth and perfect (two adjectives) seem to modify are shaped (a verb).
An adjective cannot modify a verb.
An adjective must serve to modify a NOUN.
Eliminate C.

D: shaped in such a smooth and perfect manner
Like A and E, this option implies that the MANNER of shaping the wings is EASY.
Not the intended meaning.
The intended meaning is not that the shaping MANNER is smooth but that the WINGS themselves are SMOOTH.
Eliminate D.
OA: Since the 1930's aircraft manufacturers have tried to build airplanes with frictionless wings, wings so smooth and so perfectly shaped that the air passing over them would not become turbulent.

The portion in green is an example of a RESUMPTIVE MODIFIER.
A resumptive modifier:
-- repeats a key word in the sentence
-- conveys additional information about that key word
-- often includes a that-clause
-- usually appears at the end of a sentence
In the OA, the resumptive modifier makes it clear that so smooth and so perfectly shaped refers only to the WINGS, not to the entire airplane.

(B) Incorrect. “Try and recover” is incorrect. The point is to try to recover; “try” and “recover” are not two different actions.

(C) Incorrect. For the following reasons:

“Recover x out of y” is incorrect. The correct idiom is “recover x from y”.
With this option, “this process” of the non-underlined part will refer to “trying to recover uranium”. Logically, “this process” should refer to “recover uranium”.
(D) Incorrect. For the following reasons:

The first error of option C
“To try to recover uranium” is much better than “to try for the recovery of uranium”, just as “to try to reduce weight” is much better than “to try for the reduction in the weight”. The first construction emphasizes the action that is being tried.
(E) Incorrect. “To do” is incorrect. If we replace ‘do’ with ‘recover’, the redundancy is evident. “Recovering …. to try someday” would work.

As with many complicated SC problems, the first thing you have to figure out is WHAT THE SENTENCE IS TRYING TO SAY. In many cases this is straightforward, but not here. The process:
(1) "2000 years as old as" is nonsense. If you don't see why, try applying it to a statement about other ages: "I am about 4 years as old as my brother." Huh?
This is good enough to eliminate all of A, C, E.
The only reasonable interpretation is that the monuments in Brittany are 2000 years OLDER than the other ones. There's no other way in which this sentence could legitimately make sense.
(2) To break the deadlock between B and D, we need to use the MEANING of the sentence. Here's the meaning of each choice.
Choice B ('supposed Mediterranean predecessors') --> There's no doubt that the other monuments are Mediterranean, but what was supposed (and now disproved by the new evidence) is that they were the predecessors of the ones in Brittany.
Choice D ('supposedly Mediterranean predecessors') --> There's no doubt that the other monuments are the predecessors of the ones in Brittany, but what was supposed (and now disproved by the new evidence) is that they were Mediterranean.
B makes sense; D doesn't. If you don't immediately see why, consider that the decisive evidence was carbon-14 dating (which is used to tell how old things are, not where they're from).

The sentence says that the marketing of toys was once prohibited. Logically, it makes much more sense to say that such programs that are now thriving were once prohibited. Thus, it should have been “which were once prohibited” in place of “which was once prohibited”.
Prohibiting a practice (developing programs in conjunction with the marketing of toys) makes more sense than prohibiting the final product (programs developed in conjunction with the marketing of toys)
(A) Incorrect. For the reasons mentioned above.
(B) Incorrect. For the following reasons:
The plural subject “programs” doesn’t agree with the singular verb “is thriving”.
The Noun+Noun modifier “a practice…” modifies “the marketing of toys”, leading to the same error as the first error in the original sentence.
(C) Incorrect. For the following reasons:
The use of “as” is incorrect. The correct construction would be “once prohibited by federal regulations”.
The option says that developing television programs is thriving. Either we should say that television programs are thriving or we should say that the practice of developing television programs is thriving.
(D) Incorrect. “they”, being the subject of a clause, refers to the subject of the preceding clause i.e. “regulations” in this case. Thus, the option means that the regulations are thriving. Clearly, an illogical meaning.
(E) Correct.

好难。

——句意——
1）比较错误
B：November is traditionally the strongest month for sales of light trucks, but even when 【it(代指November)】 is compared with 【previous Novembers】, this past November's sales 11月和11月比较❌ 应该是11月销量与11月销量比较
C：November is traditionally the strongest month for sales of light trucks, but even when 【they(代指sales or trucks)】 are compared with 【previous Novembers】, sales of light trucks this past November 销量 or 卡车 与11月比较❌

——句意——
1）平行错误
A：Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, 【began】 in A.D. 69, during the reign of Vespasian, 【was completed】 a decade later, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles.❌
C：Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, 【began in A.D. 69】, during the reign of Vespasian, and 【was completed a decade later】, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles. 【始建】【竣工】两者平行✔
2）缺少谓语
B、D：Construction of the Roman Colosseum, 【officially known as the Flavian Amphitheater, begun in A.D. 69, during the reign of Vespasian】, and❌

——语法——
1）主谓不一致
C、D：【Yellow jackets】 number among the 900 or so species of the world's social wasps, which 【means❌】
——句意——
1）指代错误
A：Yellow jackets number among the 900 or so species of the world's social wasps, wasps living in a highly cooperative and organized society where 【they❌】 consist almost entirely of females—the queen and her sterile female workers.
2）并列错误
D：【Yellow jackets number among the 900 or so species of the world's social wasps】, which means that their society is highly cooperative, organized, and 【it is almost entirely females—the queen and her sterile female workers.】❌ 两者并列句意有误
E：【Yellow jackets number among the 900 or so species of the world's social wasps】, living in a society that is highly cooperative, organized, and 【it consists of almost all females—the queen and her sterile female workers.】❌ 两者并列句意有误

——句意——
1）时态错误
C：Named for the New Mexico site where they 【have been first discovered】 in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over North America. 意为：到现在为止发现❌，只能在过去发现。
2）转折错误
B：Although 【named for the New Mexico site】 where first discovered in 1932, Clovis points 【are spear】 points of longitudinal grooves chipped onto their faces and have been found all over North America. “ ❌
Clovis points被命名为了一个墨西哥州的遗址”和“Clovis points是矛”之间不具有转折关系
E：Spear points with longitudinal grooves that are chipped onto the faces, Clovis points, even though named for the New Mexico site where first discovered in 1932, but were found all over North America. ❌
A：【Even though Clovis points have been found all over North America】, 【they are named for the New Mexico site where they were first discovered in 1932】
真正具有转折的是 “Clovis points在北美各地都有发现” 和 “他们以1932年首次被发现的新墨西哥州遗址命名”✔
——语法——
3）缺少谓语
D：【Spear points with longitudinal grooves that are chipped onto the faces】, Clovis points, 【even though named for the New Mexico site where first discovered in 1932】, but 【were found all over North America】
【modifier】，Clovis points，【modifier】，but【后一句】❌

——语法——
1）平行结构
A：Heating-oil prices are expected to be higher this year than last because refiners 【are paying】 about $5 a barrel more for crude oil than 【they were (paying)】 last year. 比较对象是are paying&were paying eg. I ran faster today than (I did) yesterday.
B：Heating-oil prices are expected to rise higher this year [over❌] last because ——refiners pay about $5 a barrel for crude oil 【more位置有错误】than they did last year
5 dollar a barrel more for crude oil 而不是 5 dollar a barrel for crude oil more

题目的意思是可以成为判断依据即出现这个指标就可以判断，而不是说满足这个条件就是

说明不是果导致了因

Resource-based theory offers an answer, asserting that, in general, firms gain competitive advantages by accumulating resources that are economically valuable, relatively scarce, and not easily replicated.说明答案不是A就是B
According to a recent study of retail firms, which confirmed that IT has become pervasive and relatively easy to acquire, IT by itself appeared to have conferred little advantage.确定答案是A

C：approach has not answered questions of 【whether biological life forms ever emerged on Mars】 and 【whether, presuming such life forms left fossil traces to begin with, those traces still exist in some moist recesses of the cold and arid planet.】✔
#whether those traces still exist in some moist recesses of the cold and arid planet.#
A：approach has not answered questions of 【whether biological life forms ever emerged on Mars】 and 【whether, presuming such life forms having left fossil traces to begin with, those traces can still exist in some moist recesses of the cold and arid plane.】
having left❌
can 重复

【The steel industry has changed radically over the last two decades】【主句】
, as large, integrated 【companies】【S】 such as Bethlehem Steel 【这里必须加that】once conducted operations from mining at one end of the process to shipping at the other
【have greatly downsized】【V】, or in some cases shut down altogether.

——语法——
1）虚拟语气-B
on condition that they not be named✔
on condition that their names will not be used❌

——句意——
1）gerund&noun-A
indicate a child's acquiring language, thinking, and emotional skills as an active process.儿童获取语言等技巧（具体会做）❌
indicate that a child's acquisition of language, thinking, and emotional skills is an active process.儿童获取语言等技巧（somehow参与其中，未提及具体subject）✔
2）主干错误-B
new findings that are indicative.意为：新的发现是具有象征性的❌
3）To do & doing-C
conference on new findings to indicate：开有关新发现的会，这个会导致了新发现揭示了某某事实❌
conference on new findings indicating：开有关新发现的会，新发现揭示了某某事实✔
——语法——
1）形容词做名词定语时，必须前置于名词-E
conference on new findings indicative of a child's acquisition of language, thinking, and emotional skills……❌

这个月先立一个小目标，GMAT700+~

这个解析解了跟没解一样