题目内容
翻译下列句子。
1. 去年老李退休了。退休前他教了30年数学。
Last year Lao Li _____. Before that he _____ for thirty years.
2. 到上个月底，我们已完成了工作的50%。
_____ last month, we _____ 50% of our work.
3. 在他搬到北京之前，他就已经和我们是好朋友了。
_____ he moved to Beijing, he _____ a good friend of ours.
Last year Lao Li _____. Before that he _____ for thirty years.
2. 到上个月底，我们已完成了工作的50%。
_____ last month, we _____ 50% of our work.
3. 在他搬到北京之前，他就已经和我们是好朋友了。
_____ he moved to Beijing, he _____ a good friend of ours.
1. retired, had taught
2. By the end of, had finished
3. Before, had been
2. By the end of, had finished
3. Before, had been
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