A中 they无指代对象 比较级中 do多余 要么不加 要么改成have 保持前后对等

a phenomenon that most scientists agree is caused by human beings' burning of fossil fuels 是一个名词短语 并不是句子 （嵌入式分句）
可以理解为：a phenomenon that （most scientists agree） is caused by human beings' burning of fossil fuels.

A选项：the fixed costs --makes it more...不符合主谓一致原则；
C选项：同A
D选项：去掉for;stemming from ...的主语是the electricity,与文意不符；
E选项：The cost of running nuclear plants is about the same as that of other types of power plants。比较对象不对等

想问C为什么错

E不对是因为第一句说，当飞机维护的时候，通常涂料也会被重涂。就算flim这个涂料不掉，它在维护的时候还是要被重涂的。

first pulsar, or rapidly spinning collapsed star, to be sighted was observed 这里sight 和 observed 没有意思重复吗

请问毕老师，可不可以举一个例子解释一下取非呢，有点不太理解

读句子问题。第一句话意群拆分不好

前提是社会活动多，结论是人更聪明《--------》因为人不聪明，所以才孤独

其实我觉得这个题目难在如何确定（2）是不可以的- -

except/excepting/except for的用法 mark！

not only … but also 连接两个分句，并且 not only 位于句首时，第一个分句中的主语和谓语要部分倒装。例如：
Not only does the sun give us light but also it gives us heat.
Not only did he speak English correctly， but also he speaks it fluently.
Not only is this young man clever but also he is hardworking.

读题不够仔细 去筛整个argument 的中心结论的时候太急躁了

not only和but also必须各自引导一个完整的句子

有点迷惑这道题的结论：This shows that felines were domesticated around the time farming began, when they would have been useful in protecting stores of grain from mice.

后面的when不算是结论吗？

可怕，这题我看用的时间太长了，就用有没有说mice排除了，结论都找错了

积累好词：
premium product 奢侈品（溢价商品）
mass-marketing technique 大量营销策略
price reduction strategies 降价策略

不能说后面从句修饰人的原因其实是这个in turn（轮流），因为一个人怎么轮流，只有多个 emotional reactions 才能被in turn修饰；我在做题的时候因为in turn意义不清晰了，就忽略过去了，现在看来，这个in turn就是提示你后面是修饰recations的

C选项：it指代personal spending, 重复

help in buying stocks
Here, help is a NOUN.
When help serves as a noun, help + in + VERBing is correct.

helped to keep peace
Here, helped is a VERB.
When help serves as a VERB, help + INFINITIVE is correct.