大全-C-10

10.   As part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling during the 1950s, so that they could learn to fall without being hurt.

(A) As part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling during the 1950s

(B) As part of their therapy, young polio victims learning to live during the 1950s with their disabilities were helped to practice falling

(C) Young polio victims learning to live during the 1950s with their disabilities were helped to practice falling as part of their therapy

(D) Young polio victims learning to live with their disabilities were helped to practice falling during the 1950s as part of their therapy（E）

(E) During the 1950s, as part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling

答案为什么是E而非D?