单选题
______man realized that the brain controlled our thinking.
A、
It was not until the 18th century that
B、
It was the 18 th century since
C、
Not until the 18 th century did
D、
It was until the 18 th century which
【正确答案】
A
【答案解析】
解析：句意“直到18世纪人们才意识到大脑控制着我们的思维”。“It is／was not until…that…”，译作“直到……才……”，它是“not…until…"的专用强调句型。
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