考代词指代核心名词的问题：
the weakness of the hypothesis核心名词是weakness，A/B的it指代的是hypothesis，没有D里的hypothesis做独立名词，被it指代好
C，plausible做伴随状语，逻辑主语是weakness，错误
E，which把主语weakness和谓语is隔开了，有逻辑关系的两个部分应该离得近可能近。

简单题，明确it指代的应该是hypothesis就可以了，错误选项基本上都是weakness

what引导主语从句时，
What is much more difficult to determine is A and B and C. 正确
What are much more difficult to determine are A and B and C.正确
Wrong: What is much more difficult to determine are A and B and C.
you only have a backward construction (verb before subject) if NOTHING in FRONT of the verb is eligible to be the subject.
on the table are two cell phones

官方答案是说，modifier要尽量靠近修饰的词，那这里， family legneds最近的表达方式只有E了。。。。

未划线部分是一个被动形式的伴随状语，其逻辑主语和主句主语保持一致。从逻辑上来说，只能是object（东西）被viewed，不能是speed（速度）被viewed

differentiate A from B,
differentiate between A and B;
distinguish A from B,
distinguish between A and B, 区分；
distinguish sth，识别某物

by far是“至今”的意思
the amount of 通常接不可数名词，表示……的数量，是单数，也可以用the amounts of，是复数；
the number of+可数名词复数，表示……的数量，是单数，也可以用the numbers of，是复数；

"As ___ NOUN as" is only allowed if ___ = "much", "many", "few", or "little".
E.g., Manual High has as many students as Male High.
(not) so much as

C选项：under provisions of the new maritime code修饰语放错地方了，似乎是在修饰area, 其应该被置于句首避免歧义；
D选项：this 不能单独做主语，choice (d) uses "this" as a standalone pronoun. that's pretty much never acceptable in a formal written sentence.
if you're going to use "this", you should use it as an adjective: this thing, this finding, this statistic, etc.
E选项：没有主句

D. 并不在于接两个完整句子，and 后面有thereby，所以可以是一个subject， 但是因此就有问题，引用官方解析如下：
“As in choice A, this choice suggests that the graders themselves might waste rainwater.”

问题是问反驳，什么反驳呢：a proponent of the city’s plan could make to Kayla’s objection。
也就是问：计划的支持者怎么去反驳那些反对他们的人

注意到底是什么阻止肌肉发展！！！！

结论：水里的药对健康没影响
D加强; 很多年前老的机器检测出了这种药，然而并没发现会影响健康。
（这里还暗含了老机器检测出了的药量比较高，既然高的药量都没影响，那用新机器检测出来的很低的药量对健康更没影响了）

This says that garbage containing lot of paper and cardboard burns away some dioxins. So possibly, garbage containing less paper and cardboard will not burn hot enough and hence all dioxins will get released in the air. It does compare current situation of dioxin levels with possible levels after regulation. We don't know whether the lower amount of paper will make up for releasing all dioxins but it certainly makes us doubt our conclusion. It questions our conclusion.

C: 其他广告商不会认为，k由于和竞争对手联系在一起而减少值得投放广告的吸引力。

A such spiders as ，spiders such as都可以。
B build in structure
C in the same way as用来比较两件事
Elike是介词，身后只能用名词而不能用句子

A；animals inhabited deserts= deserts are inhabited by animals; each和it搭配

A previous was/ now is; line with lead的是discus不是discus的weight。line，排列/铺陈；line A with B，用B铺陈/排列在A上
E was designed and now lined，lined继承前面的谓语动词was，时态错误，应该是was designed and now is lined，比较句里谓语动词是否能省略也经常出现这种问题。

关于插入语的逗号问题，Ron是这样说：
the man who showed up yesterday is back again --> ok (meaning = there is more than one man, and i have to clarify that it's the one who showed up yesterday)
the man, who showed up yesterday, is back again --> ok (meaning = we already know which man; i'm merely providing more detail)
the man, who showed up yesterday is back again --> not ok
the man who showed up yesterday, is back again --> not ok

a）because连词，连接完整两个句子，身前无完整句子，错
b ）主语是the prospects，谓语动词应该是复数，was错
c）excited...... 伴随状语，主语nikola tesla，修饰predicted，ok
d）and身前身后需平行，and身后是predicted 实义谓语动词，身前excited...... 伴随状语，无法平行，错
e）主语是The inventor，Nikola Tesla，变成了2个主语，错