【题目】—Do you know ____ made him successful in his career?
—Yes. His hard work and determination, of course.
A. what it was that B. what was it that
C. it was what that D. was it what that
在线课程【答案】A
【解析】考查宾语从句与强调句。你知道什么使他成功了吗？当然是他的努力和决心。Know后面跟着一个由特殊疑问词引导的宾语从句；宾语从句由what引导的强调句的特殊疑问句，故选A项。