CE:as seen作为状语，修饰紧跟的动作，在C里面修饰的是is believed to be，在E里面修饰的是grow，根据语义应该选E

A：比较对象为national average，to be selfemployed修饰national average，语义不对
B：比较对象为average American，优于A
C：定语从句的先行词在从句中不扮演任何角色，语法有误
DE：as..as而非than

not only but also 后面的句式要严格平行

AB修饰的动作是increase，逻辑主语是plan，不对
E的which指代啥都不对
C的话and后面是一个完整的句子，和前面的完整句形成平行，则是manufacturer has announced这句

shrink和projected decline有明确的时间先后关系，不是近乎同时发生，所以不能用伴随结构

s v o, n. 比 s v o, which is n. 更好
a substance to do 不好（a n. to do)

主句，but 从句， 主句

ing形式的状语逻辑主语是最近句子的主语，修饰整个句子或者动词。应该是loss result from而不能是company result from

对啊 得到两个解不可以莫

the steam locomotive required an hour or two before moving under its own power，before作从属连词+现在分词，作时间状语，修饰required

B，by constructing canals，constructing只能表示动作，不能表示结果

E，the direction was determined as a result of collisions
as a result of sth是……的结果，The failure of the company was a direct result of bad management.
不能说作为……的结果被决定

was convinced that是一个完整从句，后面再加一个that就把一句话分开成了2部分，结构上是错的。

E what是名词，不能引导定语从句
如果what effect作investigate的宾语，后面的句子作定语从句修饰what effect，则先行词没有在定语从句中充当成分，
应该说 to investigate what the effects THAT changes in working conditions would have on workers' performance
注意这个that在定语中充当了成分，不像宾语从句的that，不可以省略

平行结构，noun要平行。

as is the case with noun，sth……，就如……一样

五个选项都不好

还是不是很理解B里面的argument accept是什么意思

第二段具体解释的是上文提到关于use two variables to evaluate suppliers的strategy. 是这种strategy会导致四种结果. D选项逻辑错误，这四种结果是由strategy导致的，而不是problem( shelter suppliers from rigorous......)导致的

B，Unlike many United States cities, where a river is no longer the focal point of urban life, the river in San Antonio winds through the middle of the business district.而后面is the city's most popular attraction的主语已经变成了the River Walk, or Paseo del Rio,不再是the river的性质。不再是市中心和穿过商业中心这两个性质unlike不起来，B错误！
E，倒装
No longer do many cities in the United States have a river as the focal point of urban life,
=Many cities in the United States no longer have a river as the focal point of urban life,