网友提问：做CR错误率居高不下，居然有40%，

QQ小猪：CR主要的问题是，你要看看到底因为什么错，是因为题目看不懂还是理解有问题。我觉得CR是最理智的，比语法要更能确定答案。语法是比较没办法，如果还是不好，不行就再看看OG, 当场就知道的分数没有作文，是纸的。

网友提问：几个有关语法的问题

 1. A survey by the National Council of Churches showed that in 1986 there were 20736 females ministers, alomost 9% of the nation's clergy, double the figure for 1977.请问这里double这个词的词性是什么？

 2.which 和 that引导限定性定语从句的时候，在gmat中有区别吗？

 3. When Congress reconvenes, some newly elected members from rural states will try to establish tighter restrictions on the amount of grain farmers will be allowed to grow and to encourage. 请问这句话里，on 后是不是省略了that作为宾语从句的引导词？gmat中宾语从句的引导词不应该省略啊？那么这句话为什么是正确的呢？

 4.Like the planets, the stars are in motion, some of them at tremendous speeds, but they are so far away from Earth that their apparet positions in the sky do not change enough for their movement to be observed during a single human lifetime.请问some of them at tremendous speeds在句子中做什么成分？

QQ小猪：that、which指代前一个词，which前有逗号，一般指代逗号前最近的名词，除非主谓搭配不当，A of B.which..可能指代A也可能是B。that、which任何情况下都不能指代前面整句句子

QQ小猪：which和that在GMAT中引导定语从句还是有一定的区别的。对于非介词宾语的名词进行限定的定语从句，只能用that而非which一般情况下，which 只现定于引导先行词是名词作介词宾语的定语从句，另外还有非限制性定语从句。这个只是GMAT考点中出现的。英语的语法中，除了WHICH引导非限制性定语从句之外，两者没有任何区别的。