--- Do you know who designed the CD-ROM Around the World in Eight Hours?
--- Yes. It by Nancy Jackson.
A. has designed
B. designed
C. designs
D. was designed
网友回答
A. has designed
B. designed
C. designs
(答案→)D. was designed
解析：句意：你知道是谁设计了“八小时内环游世界”这个光盘吗？——是的。他是南希，杰克逊设计的。结合语境可知下文描述的是过去的状态，句子主语是动作对象，故用过去时态被动语态。选D。