纠结题，求助NN～～

1 A of B, which中WHICH的指代就是默认为B了吗？如果B与which不符就是错误选项了么？

2 The current economic downturn has significantly reduced advertising income both for business journals as well as general consumer magazines, especially those focusing on technology.中those不是说除了比较结构中后半段，不能单独出现的么？

3 so that 和in order that在GMAT中是怎么界定区别的？

4  

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.

1. minority graduates are nearly four times more likely than are other graduates in planning to practice

2. minority graduates are nearly four times more likely than other graduates who plan on practicing

3. minority graduates are nearly four times as likely as other graduates to plan on practicing

4. it is nearly four times more likely that minority graduates rather than other graduates will plan to practice

5. it is nearly four times as likely for minority graduates than other graduates to plan to practice

原本我很坚定选A的，但是不知为何我下载的GWD上非说B中plan on doing的结构也对，并且比较优选，纠结了。。。

请教各位NN们了～～～～～

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.

1. minority graduates are nearly four times more likely than are other graduates in planning to practice

2. minority graduates are nearly four times more likely than other graduates who plan on practicing

3. minority graduates are nearly four times as likely as other graduates to plan on practicing

4. it is nearly four times more likely that minority graduates rather than other graduates will plan to practice

5. it is nearly four times as likely for minority graduates than other graduates to plan to practice

原本我很坚定选A的，但是不知为何我下载的GWD上非说B中plan on doing的结构也对，并且比较优选，纠结了。。。

请教各位NN们了～～～～～

刚好总结到了，转一下吧：

UP~~大家帮忙看看呀

另外

A OF B THAT不是看B作为中心词的么,不过GWD
                    13-Q11:

....a group of New World tropical birds that includes more than 230 species and 
                            is......那为什么是单数呢?请教NN~困惑中

....a group of New World tropical birds that includes more than 230 species and 
                is......那为什么是单数呢?请教NN~困惑中

a body of/a collection of/an arrary of/a series of/a set of/a portion of/a group of + 复数名词作主语，谓语动词用单数。

a total of + 复数名词做主语，谓语动词用复数。

an average of + 复数名词做主语，谓语动词用复数；  the average of + 复数名词作主语，谓语动词用单数。

新东方上那道题答案错的，5年前gemj就已经挑战过该题，anchoret也已经把新东方的答案改正...楼主可以看看这里：

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=22751&replyID=&skin=1