1·Although working very hard, he failed to turn in his research paper on time.
尽管他非常努力,但还是没能按时交上他的实验报告。
2·You are free to collaborate with other students on the homework, but you must turn in your own individually written solution and you must specify the names of your collaborators.
你可以与其他同学合作完成作业,但你必须交上自己完成的解答并且写明合作者的名字。
3·You must turn in you papers before Friday.
在星期五之前你应该交上你的论文。
1·You must turn in the key when you leave the hotel.
你离开旅馆时一定要归还钥匙。
1·No, I don't think I would turn in my own child, but I would make their life so miserable, they would probably wish I had put them somewhere else.
不,我想我不会告发我自己的孩子,但我会让他们的生活变得痛苦。他们可能会希望我把他们放在其他另外的地方。