Some friends tried to settle the quarrel between Mr and Mrs Smith without hurting the feeling of , but failed.
A. none
B. either
C. all
D. neither
网友回答
A. none
(答案→)B. either
C. all
D. neither
解析：由于句中谈到的是 Mr and Mrs Smith，即谈的是两者，故排除选项A和C，因为 none 和all 均用于指三者。又因为空格前有否定介词without，故空格处填either, 不用 neither。