49.If you don’t want to answer a complex email immediately, you can give the sender ___49___, telling him or her when you will write back.

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.

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

48.With an initial scan, you will find emails that need your   48   .

18. There was so much noise in the classroom that the teacher couldn’t make himself ____.

( )52. Learners can get credits by attending short courses.

( )51. Some education institutions provide programs which offer credits to help CE students get some recognized industry qualifications.

44. Which one of the following statements is NOT true according to the passage?

21. He told me how he had given me shelter and food, otherwise I ____ of hunger.

37. When Guanlao set up his library outside his house, he hoped that ____.

62. 非常感谢您对这个项目的技术援助。

57. 尽管是十五年前制造的，这台机器仍然状态良好。