( )15. Even if the one you are talking with is impolite, you should also respond to him or her for politeness.

62. 非常感谢您对这个项目的技术援助。

25. ____ technological progress helps to relieve work is a fact accepted by people.

58. 这家工厂只有不到十年的历史，但产品已经进入国际市场。

46.To protect your computer system from virus infection, delete ___46___.

66. In recent years, an increasing number of college students are involved in various volunteering causes. There is no denying that volunteers make great contributions to society. On the one hand, in any big events such as Beijing Olympic Games and Shanghai World Expo, human resources are surely in great demand. Whatever a volunteer can do is helpful for the event. On the other hand, students can reap great benefits from volunteering work. Various experiences in their volunteering practice guarantee their brighter future career.

30. It is prohibited by law to mail parcels that might prove ____ in transport.

27. It took her a while to ____ living alone.

50.If an email needs only a short answer, you should   50    . 

47.Prioritise your emails according to the sender, subject and ___47____.

34. Even though the customer was very rude, the shop assistant ____ calm and polite.

59. 这次会议所讨论的内容仅限于议程上的项目。