Question

17.   he graduated from high school did the boy realize that he had misunderstood his teacher's kindness.

A. Not until         B. Until

C. It was not until    D.  It was until

Answer 1

17.   A考查not until引导的倒装句结构。根据后面的did the boy realize可知，本句前面应用not until的形式。句意：直到高中毕业这个男孩才意识到他误解了老师的善意。