单选题 ______ did I feel they were being unreasonable.
【正确答案】 A
【答案解析】[考点] 词义辨析
[解析] at no time：决不，从不；at a time：每次，逐一；at one time：在过去，从前；for a time：暂时，一度。根据句意及倒装结构，选A。