标题: 求助prep2012 69题 [打印本页] 作者: lulu178101 时间: 2015-10-3 20:23 标题: 求助prep2012 69题 Prep2012-Pack1-SC-069 VSC003901 hard
Laboratory rats and mice live up to 40 percent longer than usual when fed a diet of at least 30 percent fewer calories than that which they would normally eat, but that otherwise contains all necessary vitamins
and nutrients.
A. of at least 30 percent fewer calories than that which they would normally eat, but that otherwise
B. with at least 30 percent fewer calories than what they would normally eat though otherwise it
C. that has at least 30 percent fewer of the calories that they would normally eat, but otherwise it
D. that has at least 30 percent fewer calories than they would normally eat but that otherwise
E. that has at least 30 percent fewer calories than that which they would normally eat, though that
otherwise
答案选D，想问than前后的平行结构是什么？为什么不能在than they would normally eat的they前面加what?