Not until I began to work______how much time I had wasted.

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问题 Not until I began to work______how much time I had wasted.

选项 A、didn’t realize
B、did I realize
C、I didn’t realize
D、I realized

答案B

解析本题考查以否定词开头并修饰状语时的主谓语序，这时原状语可以是副词或介词短语，还可以是从句，而主谓的语序为部分倒装，答案为B。

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