Was it not until you began to work ___ how much time you had wasted?

A.did you realize

B.that you realized

C.did you not realize

D.that you didn’t realize

答案及解析： B

解析：

考查特殊的强调句：it was not until..that…直到才，句意：直到你开始工作你才意识到浪费了多少时间吗？选B。