这题对我真是钻石级别的难题。。。。

这道题做的比较慢，先排除A，conceptoin不是替代品，B错在but which，D错在which指代模糊，E错在other than，选C

Manhattan
”where" is used specifically to refer to a place or geographic location; it also indicates a noun modifier and must follow the noun that it is modifying. In this case, "where" follows "electricity" but electricity isn't a location so it's not a valid use of "where."“

表达事实要用一般现在时！

再做这个还错，还是因为没有理解clone这个单词的意思，不但是克隆的意思，还有克隆人/动物的意思，所以在本句中的意思是后者，要和clone平行就需要是members，因为都是实物。

哇，莫名其妙的就觉得豁然开朗了！

干扰项C确实挺讨厌的。

另外附上beatgmat的解释：
“the goal is not to ultimately reduce the numbers. It would be better if the commission could reduce the numbers now than if it reduces "ultimately". However the goal itself is ultimate (i.e. the final goal). Therefore placement of ultimately is wrong in option B. ”
ultimately的卫视有问题，所以选E

the goal一般是加of而不是to

简单的说：reduce的一定是数量，所以AC排除，the guest后面要跟who，所以BD排除。选E。
在选择的时候考虑了之前做题遇到的‘s只能跟人的用法，犹豫，还有就是goal后面跟of还是to，但是这样得不到结果，只能从其他方面下手。

此题省略了on Wednesday 的on

做题的感觉就是觉得应该加上the time

排除B的根本原因是have主谓不一致，主语是economy不能用have，被动确实不好，句子也不够简洁。

我觉得e除了both。。and。。的错误，另一个错误是逗号后边的and bringing应该是跟was published平行。应该是and brought。。是不是就对了呢~~

老师，我觉得d是因为双谓语所以错吧？

通过easily could have been排除了D

you can also just remember this structure as an idiom: "take [TIME PERIOD] to + verb"
The mechanic took only 20 minutes to perform a complete tune-up on my car.

there's no other construction that is idiomatically acceptable with "take + (time period)", so, if you're good at memorizing things, this one is black-and-white.

c的at the same time是状语，因此which指the same time

remember that "while" can also be used as a general indicator of contrast, including contrast between two things that are not necessarily in the same timeframe.
e.g.,
while square-toed shoes have largely gone out of fashion in the club, they are still often seen at the office.

给GMAT.la 一个真诚的建议：很爱用网站做题，但是“模考”板块模考时的闪退真的太让人烦恼了。好多次，我都是把所有题的答案记在纸上，然后再重新输入。可是这样做，太浪费时间了。本来题很好、毕老师解释也到位，但是如果因为闪退，那就很难竞争过部分网站了。希望后台程序猿同志，能在这个部分改善一下。