问两道高中英语选择题
1.Thediscussion_____alivewhenaninterestingtopicwasbroughtin.
A.wascomingB.hadcomeC.hascomeD.came
2.——IhearJanehasgonetotheHolyIslandforherholiday.
——Oh,hownice!Doyouknowwhenshe____?
A.wasleavingB.hadleftC.hasleftD.left
还有告诉我为什么要选这个答案,我要弄懂为什么?谢谢