——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
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.
——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……❌
——句意——
1）比较错误
A：Laos has a land area about the same as 【Great Britain】❌
2）并列错误
B：Laos has a land area of about the same size as Great Britain is, but 【in Laos there is a population of only four million】, and 【many are members of hill tribes ensconced in the virtually inaccessible mountain valleys of the north】 ❌ and并列的很不合理
D：but 【only four million in population】, and 【many are members of hill tribes ensconced in the virtually inaccessible mountain valleys of the north】❌
3）主语缺失
C：Laos has a land area that is about the same size as Great Britain's land area, but 【in Laos with a population of only four million people, many of them are members of hill tribes ensconced in the virtually inaccessible mountain valleys of the north】❌没有主语后半句
4）正确转折
E：Laos 【has a land area comparable to that of Great Britain】 but【(has) a population of only four million people】, many of whom are members of hill tribes ensconced in the virtually inaccessible mountain valleys of the north.✔
——句意——
1）比较错误
D：would 【have to know】 a great deal more than 【they do now】 about the social and economic，比较对象为【不同时间下的两件事】✔
E：would 【have to know】 a great deal more than 【now】 about the social and economic，比较对象为时间❌
由于前句没有时间状语，后句只能被理解成为【now】，而并不能理解为【省略了谓语动词】
——句意——
1）主语错误
A、B：句意均为“我arguing……”❌
应该为“Discourse arguing……”
2）平行错误
C、D：equal political and legal rights and for changes in the married women's property laws❌
E：句意里应该平行的是a treatise that argued 【for equal political and legal rights for women】and【for changes in the married women's property laws】✔
——句意——
1）主语错误
A：at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
意思为：我们的祖先减少了他们的数量和基因变异❌
E：some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly, and thus our genetic variation.
句意为：我们的祖先减少了他们的数量和基因变异❌
2）and 前后并不平行
C：that some time in the past our ancestors suffered an event so that their numbers were greatly reduced, and thus our genetic variation.❌
D：some time in the past our ancestors suffered an event from which their numbers were greatly reduced and thus our genetic variation.❌
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——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】❌