偶然撞见的这网站，找资料找好久了 这网站？！也太棒了！！！

如果不能，可以未来加入这个功能吗

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a two-year study beginning in 1977 found that, among 85-year-old people, those whose immune systems were weakest were twice as likely to die within two years as others in the study. The cause of their deaths, however, was more often heart disease, against which the immune system does not protect, than cancer or infections, which are attacked by the immune system. A. there were twice as many infections among those in the study with the weakest immune systems as among those with the strongest immune systems. B. the majority of those in the study with the strongest immune system died from infection or cancer by 1987 C. some of the drugs that had been used to treat the symtoms of heart disease had a side effect of weaking the immune system D most of those in the study who survived beyond the two-year period had recovered from a serious infection sometimes prior to 1978 E those in the study who survived into the 1980s had in 1976 strengthened their immune systems through drug therapy. 没太理解这题的意思，属于什么推理方式呢？请教大牛

prep 里为啥都没有IR和写作，你们有这种情况吗

Hello! I am studying for the GMAT taking it in December. I was wondering if there were any english speakers I can discuss questions with on wechat and to discuss any study plans :) Good luck!

感觉有点困惑啊。连着三天摸了3套，数学每次错三题，不在前10道。Verbal每次在6道左右，偶尔前10道错一两道。无论是verbal还是数学错的题都不是简单题，最起码难度medium以上，也不是连错。可是每次出了分都是620左右。真的很想哭。 想知道到底是什么问题。有同学有类似的情况吗。

就是在做og的时候总是碰到有比较的，比如某某今年比去年高多少，这里前后比较的主体到底怎么判断对不对啊……什么时候可以直接more than the last year，什么时候要说more than that of 之类的……比如og18 的772题！求帮助

做了模拟题有些题收进了错题本但是找不到错题本

今天做了一套数学（gmatla第一套），感觉比prep难多了，时间也很紧，现在再做verbal感受下。