They were all very tired but of them took a rest.A. noneB. allC. bothD. either

问题补充：

They were all very tired, but of them took a rest.

A. none

B. all

C. both

D. either

答案：

A. none

B. all

C. both

D. either

解析：考查不定代词的用法。并列句的前面有all，说明超过二人，排除C、D选项；连词用了but，有转折的意思，说明累却不休息，因此后面要用否定词。故选A。