题目内容：

英语翻译
1、到我回家的时候,妈妈已经把饭做好了.
2、到上个学期末,我们已经学了2000多个单词.
3、当他们到电影院时,电影已经开始了半小时.
4、当警察到达时,抢匪已经跑掉了.

优质解答

1. My mother had made the dinner ready when I arrived home.2. By the end of last semester, we had learned more than 2000 words.3. The movie had begun half an hour before when they arrived at the cinem...