问两道高中英语选择题

题目

问两道高中英语选择题
1.The discussion_____alive when an interesting topic was brought in.
A. was coming B. had come C. has come D. came
2.——I hear Jane has gone to the Holy Island for her holiday.
——Oh, how nice! Do you know when she ____?
A. was leaving B. had left C. has left D. left
还有告诉我为什么要选这个答案,我要弄懂为什么?谢谢

答案

1.选D.
这一句中就是简单地陈述过去发生的两个事件,当然是有先后顺序的,不过the discussion came alive 和an interesting topic was brought in这两件事是紧密相连且有一定的因果关系的,所以只需要用一般过去时就可以表达了,即一个有趣的议题被提出来了,（所以）讨论（立刻）变得活跃了.
2.选D.
这一句中Jane has gone to the Holy Island for her holiday是一件已经发生的事情,所以“她离开”这个事件必然也是发生在过去的,只要用过去时就可以了