题目内容：

50分：两道初三英语填空 告诉我为什么?
In the 12 months since I last wrote to you,a lot____(happen)to me
这里用完成时吧?是用have还是has
I'm very sorry because the heavy rain____(prevent)us from getting to school on time.
填过去时吗?
我要尽可能准确的答案

优质解答

has happened;
a lot作为整体,用单数
prevented
描述的事件发生在过去