prep 99 求助～～

melissa_gao

99. Frederick Winslow Taylor, a machinist and engineer who worked in the early twentieth century,

believed that the productivity of a job could be improved if one were to separate the components of

a task into its individual motions and found the best way to perform each motion, then redesign the

job so that each motion could be done as efficiently as possible.

(A) if one were to separate the components of a task into its individual motions and found the best

way to perform each motion, then redesign

(B) if one separated the components of a task into individual motions, found the best way to perform

the motions, and then redesigning

(C) if the components of a task were separated into individual motions, finding the best way of

performing the motions, and then redesigned

(D) by separating the components of a task into individual motions, finding the best way to perform

each motion, and then redesigning

(E) by separating the components of a task into individual motions, finding the best way of

performing each motion, then redesign

answer: D

可以我觉得D也有问题啊，为啥要加"," ", + and" 后面不是要跟一个完整的句子吗？？

thanks

AlienX

"X, Y, and Z"是常見的structure...