It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind， ？
A. was it
B. wasn’t it
C. did they
D. didn’t they
网友回答
(答案→)A. was it
B. wasn’t it
C. did they
D. didn’t they
解析：考查反意问句，反意问句一般都是和主句一致，这句话是强调句，和it was一致，因为前面是否定，反意问句是否定式。句意是：知道18世纪人类才意识到大脑是和思维的工作有关的。选A。