看了些前辈的manhattan SC笔记上的意思是 they 和them在同一个句子中出现就是指代同一个的，所以不理解A选项所谓的语法上指代和逻辑上指代，逻辑上指代能懂应该是说逻辑上说得通，应该是durable goods ，但是语法上是orders是怎么判断的？？？因为按我这里说的指代同一个的话应该是analysts.
{已解决 看回帖}（2）关于make it more expensive to buy on credit不如make buying on credit更简洁 找到了个帖子：http://forum.chasedream.com/forum.php?mod=viewthread&tid=547566&highlight=prep180 这里的解释主要是：
make it possible to do, make it expensice to do
这种表达中的it 都是形式宾语，真正的宾语是to do, ETS也了简洁，把it 都省略了，变成 make doing sth possible; make doing sth expensive.
但是看到了一份baby姐的解释，立刻关于it指代出现三观颠覆的事了
http://forum.chasedream.com/thread-649443-1-1.htmlbaby的解释:
不能理解为指代后面的不定式
....made it difficult to do ... 假如你认为这个it指代后面的"to do"的话，
I found it difficult to apply grammatical principles to a SC problem and to reach the correct answer.
这句话里面it难道该改成them? 因为后面to apply and to reach是两件事情啊！
可是事实上，这个it不能改成them，必须就是it。
一下子推翻了我以前关于形式主语形式宾语的认定，求NN们解释一下。
baby姐补充的解释：典型结构，it不指代任何东西
THE ONLY PRONOUNS ON THE GMAT THAT DON'T HAVE TO STANDFOR NOUNS:
It + description+ that +complete sentence (independent clause)
It + description+ to +verb (infinitive)
It + (TOBE verb) + NOUN + that/who + verb
these "it"s DO NOT have to stand for nouns.
ALL other gmat pronouns must stand for nouns.
FIRST TYPE
It + is obvious + that Medellín will beat Nacional in Wednesday’s game.
It+ has been said + that the moon is made of green cheese.
Johnny found it + counterintuitive + that the GMAT tests exceptions to rules just as often as ittests the rules themselves.
SECOND TYPE
It + is often difficult + to distinguish between a past-tense verb and a pastparticiple.
The rain made it + quite challenging + to drive on the freeway.
THIRD TYPE
It + was my own brother + who committed the crime.
