Was it not until you began to work —— how much time you had wasted?
A．did you realizeB．that you realizedC．did you not realizeD．that you didn’t realize
B
B解析：該題為It was not until…that的強(qiáng)調(diào)句型一般【疑問句結(jié)構(gòu)，that部分為陳述結(jié)構(gòu)。如果not until引導(dǎo)的時間狀語位于句首，則主句必須采用部分倒裝形式，且用肯定結(jié)構(gòu)。但本題中not until時間狀語被強(qiáng)調(diào)，情形不同，主句仍為陳述語序。故選B。
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