因：rather than changes in the material properties of the string， 果：Guitar strings often go "dead"，关键词go dead在e中出现
控制变量：Determining whether smearing various substances on new guitar strings causes them to go dead

选项B: Mideast immigrants are exhibiting rates of entrepreneurship exceeding virtually every other immigrant group in the increasingly diverse United States economy. 其中exceeding作为定语修饰rates of entrepreneurship

选项A：were built & were connected 两个谓语动词之间没有任何连词连接
选项E：缺少连词

E:真正具有对比关系的，应该是small quantities of spices are used（这里的重心词是use这个事件）和take，而不是本选项中的 the usage of spices is in small quantities（这里的be动词这个状态）和take。但在逻辑上，真正能对比的对象应该是use和take。

in addition to的意思是：除…之外…。其连接的两个名词不一定要具有可比的关系

选项A中的amounting to能否看成是谓语动词decrease 的伴随状语？

假设W=4
X：干w=4，需要n+2天，每天干4/(n+2)
Y: 干w=4，需要n天，每天干4/n
方程式1:（4/(n+2) + 4/n) *3 = 5
方程式2: 2w=8，8/(4/n+2)) = 选项
此时带入选项ABCDE入方程式2，得到n，再代入方程式1验证，即可知道该选项是否正确。

E选项，担心的对象不能是一个物体。

pirated DVD盗版的

我真的是想的太多了，以为call只能是整数。。。。算出来8.4，选了9！

关键词seed production

the number of televisions sold annually in Borodia has not changed. 关键句啊没看到
销量不变，生产人数，生产所用平均时间的关系

原文没说training of actors 不要脑补

The director claims that this production is as similar to the original production as is possible in a modern theater.

第二句就结论啦，不管他所在的句子是疑问形式还是确定形式，黑体部分就是conclusion。

结论本身也可以是另一个结论的premise

e在加强前提，而前提已经是确定的了，不需要加强

中间的conclusion：They reason that, since top executives evidently have faith in the bank's financial soundness, those worrisome rumors must be false.

The first describes evidence that has been taken as supporting a conclusion; the second gives a reason for questioning that support.

very many fewer miles更少的

If D is true, we are given that competitive people believed that they were less likely to win with more people. Hence it makes sense that they would feel that extreme effort would not be worthwhile in the 500 participant race. Then our explanation makes more sense. Correct.