翻译练习 -- A translation exercise

1、He couldn't find the place, though he had tried to locate it the whole morning. 他找那个地方找了一整个早上，依然没有找到。
2、It was nearly midnight last Saturday night when the dance was over. 上个星期六那场舞会将近午夜才结束了。
3、He is going to stay in Beijing during the summer vacation. 他打算在暑假期间留在北京。
4、Mr. Li, the teacher, is very concerned about his students. 李老师很关心他的学生。
5、Please hand in your exercise book tomorrow. 明天请把练习册交给我。
6、What does this sentence mean? 这个句子有什么意思？
7、This conductor is very warm toward the passengers. 这位列车长对乘客很热情。
8、Although they didn't stay at her home for long, they had a very good time. 虽然他们沒在她的家呆太久，但是他们很开心。
9、How do you express this in Chinese? 这如何用汉语表达？
10、Immediately after she received a letter from Palanka, Ding Yun wrote her a reply. 丁云一收到了帕兰卡的来信，就写了一封信回复。