英语问题Not until he retired from teaching three years ago .
Not until he retired from teaching three years ago ------- having a hoilday abroad
A he had considered B had he considered C he considered D did he consider
Jack is a great talker .It is high time that he ----something instead of just talking .
A will do B has done C do D did
顺便帮我解析一下谢谢（不要一面子一面子的复制，我没那么多时间看），