885-04-11

11.   Several studies have found that the coronary patients who exercise most actively have half or less than half the chance of dying of a heart attack as those who are sedentary.

(A) have half or less than half the chance of dying of a heart attack as those who are sedentary

(B) have half the chance, or less, of dying of a heart attack than those who are sedentary do

(C) have half the chance that they will die of a heart attack, or less, than those who are sedentary do

(D) are at least fifty percent less likely to die of a heart attack as those who are sedentary（E）

(E) are at least fifty percent less likely than those who are sedentary to die of a heart attack

   这道题各项的具体错误还是有点模糊，之前好像没人讨论过，哪位牛牛能分析一下各项具体错在哪里，多谢。

at least fifty percent less 表达最简洁，排除A,B,C;  在D 中，less....as 错误，less...than 才对。

A  as表比较但前面没有原级形容词也没有前一个as

B less 这里是名词，1 : a smaller portion or quantity，than表比较但前面没有形容词比较级。

C 同B。that they will die 正确，但没有 of dying 简洁。

D  as应该改成than

E Correct.