经过几天的苦战高低把涵洞修好了: after days of hard work the culvert was at last completed
自从: since 短语和例子自从去年至今他未回过家。he hasn't been home since last year. 自从实行新的管理制度以来, 这个厂的生产有了很大发展。 since the new management system was put into effect, the production of this factory has increased tr
上星期我把表放在这里修理的修好没有: i left my watch to be mended last week is it ready
