（ ）13. Glasses help people to remedy their eyes.

50. (3) Take exercise and have time to___ yourself.(4) Get advice from your parents, teachers and friends.

46. Meaning of stress: Stress is a feeling if you______ about something that you cannot solve.

64.我们已研制出了能大规模提高生产的方法。

Part Ⅴ Applied Writing (20 Points)Directions: This part is to test your ability to do practical writing. You are required to write a Certificate of Employment according to the information given in Chinese below. You should write your letter (no less than 100 words) on the Answer Sheet.北京大学的约翰史密斯先生将到我校举办关于美国文化的讲座。请根据以下要求以英语教学和研究处的名义写一则通知。(1) 时间：十月十八日；(2) 地点： C102教室。

25. —May I play the computer game tomorrow, Dad?—Certainly not, unless your homework _____ by then. 

（ ）51. Simon has got many pen friends and net friends home and abroad. He loves this school and wishes that he could do something to have more people know about it, those excellent teachers and students, the activities and its glorious achievements.

29. Some students have difficulty _____ English, so they often ask their English teacher for help. 

66.Now colleges and universities are seeing a change in students’ lifestyle. More and more college students prefer to stay in the dormitory in their leisure time and become indoorsmen or indoorswomen. The Internet offers students many options to kill the spare time. Various on-campus services, from food delivery to laundry services, are fueling the culture of staying in dormitories. Some students argue that outdoor sports or social activities are no better than staying in the dormitory and playing on a computer. Irregular life and lack of physical exercise have become the health enemy of college students.

34. —Tom, let’s hang out after school.  —Sorry. I have _____ Frank to work on the biology report with him. 

56.众所周知，肺癌至少部分是由于吸烟过多而引起的。

28. While cleaning the snow on the road, _____.