2个错误选项，求NN指点。在线等~

spz316

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






大全的题，答案是E，可是想问下B和C选项哪里有问题了？

spz316

up

yydetiankong

B,C的比较成分都变成插入语了~可以省略来看~那么选项中的than就不知道在比什么了~

lovesasa0820

同意楼上，而且感觉BC句子结构很尴尬，E的话顺很多
而且half the chance,or less这个表达没有at least fifty percent 好