根据n多题专家分析，试题“Only when class began ____that he had left his book at home. [ ]A. will he realizeB. he did realizeC. did he realizeD. should he realize …”主要考查了你对  【一般过去时】，【部分倒装】  等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

与“Only when class began ____that he had left his book at home. [ ]A. will he realizeB. he did realizeC. did he realizeD. should he realize ”考查相似的试题有：