—Allthevolunteers（志願者）wereverytired,but　 ofthemtookares...

問題詳情：

—All the volunteers（志願者） were very tired, but 　  of them took a rest.

—They were busy looking for the missing people.

A. everyone   B. all       one　               D. none

【回答】

D  由題意可知。

知識點：不定代詞

題型：選擇題