单选题 17. ______ man realized that the brain controls our thinking.

A、 It was not until the 18th century, that
B、 It was the 18th century since
C、 Not until the 18th century did
D、 It was until the 18th century which

【正确答案】 A

【答案解析】[考点] 强调句
在强调“not...until...”句型中表示时间状语的until短语或从句时，要用固定的强调句型“It is/was not until+被强调部分+that+其他部分”。分析句子结构可知，本句是对until the 18th century进行强调。故选A。
直到18世纪人类才意识到大脑控制着我们的思维。