To be qualified for the job,_________.

题目

To be qualified for the job,_________.
A.profound knowledge in electronics is need
B.it is required that one has profound knowledge in electronics
C.one needs to have profound knowledge in electronics
D.profound knowledge in electronics is important
问为什么?

答案

主语要一致,因为这是一句话嘛.主语根据前半句可判断是人.