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, _____.

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

42. Which of the following is NOT true according to the passage?

21. _____ several times, they need encouragement.  

24. Why are you so upset? The gift is exactly_____ you have expected. 

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

（ ）54. Jennifer is a kind and helpful girl who is always willing to offer a helping hand to whoever needs it. As a student, she knows that many of her schoolmates need help and care. She wishes that she could do something for them.

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。

59.应对焦虑情绪的最好办法可能就是倾诉了，虽然有时未必有倾听者。

58.他会说点汉语，因此能很容易地适应北京的生活。