老师，D和E中until后面的部分 有区别吗？

方案：a technology for preventing leaks is being installed.
目的：the fears are groundless.
A CQ3 方案带来副作用
这样对吗？

http://www.manhattangmat.com/forums/bf-kaplan-t670.html

这个结论是thus cannot be justified就是这个program不合理，但是要undermine就是削弱，所以就是要找说明这个项目是合理的。

was for身后只能加非特殊时期的意思是不是说只能加时长，不能加特定的时间？

老师 d中的failing有问题吗

第一个条件单独为什么不可以呢？因为profit margin是30，结果总共270，就是卖掉了9件呀

为什么likely对宾语的约束性较强而possibility对后面的宾语约束力弱呢？

By the time Europeans sailing the Atlantic coast of North America first documented the fur trade, it was apparently well underway.

highlight text: Only later, upon reading Nicolas Denys's 1672 account of seventeenth-century European settlements in North America, did archaeologists realize that sixteenth-century European fishing crews had dismantled and exchanged parts of their ships for furs.

a为什么不对啊

老师，OG的解释是说后面那个从句的结构要和主句平行，所以E选项里面it指代主句主语，补完整的话就是owning and living in a freestanding house on its own land was (the goal) of earlier generations。
可是为什么不能是比较the goal of the two generations呢？A选项的that如果理解为指代goal的话，为什么不可以呢？比如说like that of earlier generation, the goal of the young adult is owning and living...感觉这样就很对>

【求教】这里为什么不能用differences between呢？不是两个耳朵听到的差别么？似乎是两者之间的差别呀？烦请老师解答~谢谢！

请问老师，这个是相关=》因果的类型么？如果是四个CQ方向中，答案是属于哪一种呢？

highlight text: Because consumers are invited to make up their own minds, implicit conclusions reduce the risk of resentment, distrust, and counter argumentation.

因果写反了。因是大部分美国人乘坐飞机

老师。可以理解为是果因推理吗。相当于是A however notB 。果是:大部分美国人都是乘坐飞机 因是花在飞机上的费用占总交通费的一半 找一个他因削弱推理。 选D，给出了一个他因，由于飞机更贵，其他交通方式更便宜

A选项中的they赘余的话，可以直接改为if rate the watt-hour higher吗？这样条件状语从句不就没有主语了吗。。