Was it not until you began to work______how much time you had wasted?

【正确答案】 C

【答案解析】解析：句意：直到你开始上班才意识到你已经浪费了很多时间吗?题目中为it was not until…that…的一般疑问句，that后引导宾语从句，没有倒装形式，故答案选C。