15. Not until father came in to prepare my lessons.A. I beganB. did I beginC. I had begun

发布时间：2020-08-16 06:14:16


15. Not until father came in      to prepare my lessons.
A. I began
B. did I begin
C. I had begun
D. had I begun

网友回答

A. I began
(答案→)B. did I begin
C. I had begun
D. had I begun
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