other than what it is不是连词，不能连接两个句子。other than = except，是“除了…以外”的意思，而且是介词短语，other than应改为rather than，且rather than可做介词亦可做连词，意思为“而不是…”。

C- they can't refer to security surveillance system, wrong.

答案C是鱼死在了下游，所以不是机械的原因，所以削弱了conclusion
答案A，游进来的鱼出不出去，跟计算进来上游的鱼没有关系！！！

错选B，没有看到Conclusion是maintain classical music by encouraging young generation enter the field, which is not only classic musical. can be any genre of the music. 选项B是花团锦簇，每家都盛开， 是support了conclusion的
而C是踩了古典音乐的现场版，年轻音乐家怎么会有磁带

B居然多一个a！！

DC区分:
A: as well as代表等级不同
Beside 有”除了……之外，还有……"的意思，但是加also冗余，所以BC不对
E: 语法不对

CD区分：
原句句子结构：With…, the US acquired…, doubling… and bringing…［acquire是核心词］
A：which修饰错误，不能用which指代前面的一件事情
B：and it bought不平行
C：✅［很神奇的with正确］
D：double、bring应该是平行关系
E：核心词有误，E着重于美国花多少钱买的

that companies should use to evaluate 是strategy，B错在：provides an explanation for the occurrence of a situation。第一段最后说的是4个情况，即便是解释也是解释四个；另外解释的并不是这四种情况为什么出现（occurrence），而是对四种情况分别展开讨论，讨论的是strategy应用的四个情况。。

so指代reported high marital satisfaction
省略式的说法

A/B/D：下降/上升/增加/减少等已经暗含了对比关系，不再用compare with/in comparison等
D，those of the eighteenth century没有平行对象。前面是一个单独的不带修饰语的名词their numbers，不能与those of平行。如果是Their numbers of today declined from those of 18th，满足平行要求（但很wordy）。

let A(only) + B(only) + AB(only) + neither = 1

from statement (1), it is clearly insufficient but it it means that neither = 0.3
from statement (2), it is clearly insufficient but it it means that B(only) = 0.1

by combining them, P(A) = A(only) + AB(only) = 1- (0.1+0.3) = 0.6

few/fewer/fewest，many/more/most修饰可数名词；little/less/least，much/more/most修饰不可数名词。

for n=1, a1= 3/2
for n=2, a2= 4/3
for n=3, a3= 5/4
for n=4, a4= 6/5

Testing products:
n=even, product is an integer (a1*a2= 2 , a1*a2*a3*a4= 3)
n=odd, product is a non-integer (a1*= 3/2 , a1*a2*a3= 5/2)

St1: n+1 as a multiple of can be either odd or even and hence n can be either as well. Insufficient

St2: n is even. Sufficient.

E，如果要使over修饰状语，写法是：As banks have systematically raised their old fees and invented new ones over the past few years, it is ……。把over放到as状语从句里来。

如：Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture to 1950.表示从农业的起源到1990就是1000年时间，用did。
in the 25 years since jurgen schult's world record discus throw, very few throwers have even come close to equaling his mark.表示从JS打破世界纪录到现在，就是25年时间，用have。

B，since releasing可以构成伴随状语，使descendants成为release的逻辑主语
C，the+数字+名词表示那些就是全部数量，如：the three witnesses to a crime意思是总共只有3名罪犯。the 35 years since表示从……到现在就是35年，它对应的是现在式而不是过去式。

哎这道题好简单都错了，因为得出了≈25/48≠1/2就草率排除了，粗心粗心

(1)M>500==>NS
(2)J=2M-400==>J-M=M-400>0==>J>M==>s
总结：遇到比较大小题目可以看能不能做差比较>0 or

What percent of the employed people in Town X are females?审题谨慎，问的是在employed people中有多少是female？所以分母是employed people而不是total population，应该是16%/64%=25%

(1)30=2*3*5=5*6*1因此是不能单独确定的