Neither of them knew what was doing. A. otherB. othersC. the otherD. another

问题补充：

Neither of them knew what was doing.

A. other

B. others

C. the other

D. another

答案：

A. other

B. others

C. the other

(答案→)D. another

解析：本题是代词的考查。理解句子的意思就比较容易分析此题：“他们谁也不知道其他人干什么。”只有D选项符合题意。