SC question:同样句子结构为什么不同答案呢？-->Zeros转移

XDF资料中两道题题型类似，答案却不同，请NN指点：非常感谢

1. According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minortiy graduates are nearly four times more likely than are other graduateds in planning to pratice in sociaeconomically deprived areas.

2.Several students have found that the coronary patients who exercises most actively are at least fifty percent less likely than those who are secondary to die of a heart attack.

我只写出了正确的的答案，但是两者划线的句子部分结构相似，为什么用than一个省略了are，一个却不能省略。

对于第一题，答案C minority graduates are nearly four times as likely as other graduates to plan on practicing in sociaeconomically deprived areas.错误在哪几处？

语法问题得发到语法版，不在困境版的

还有，LZ确认你的答案没有问题？我觉得第一句C才是对的：

1) 此比较句中的are完全可以省略
2）be likely to do something  
原句中为are 4 times likely in doing something 我觉得没有理由正确 

1. According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minortiy graduates are nearly four times more likely than are other graduateds in planning to pratice in sociaeconomically deprived areas.

这是争议题