[解析]
(1)、C 18.B 19.A 20.C
【原文】
Now I'd like to talk to you about the final exam.The exam will be held next Thursday,the last day of the exam week.Remember to bring along two or three pens in case you run out of ink.You will have to answer three of the five questions to write your articles.The exam will be quite difficult,which means you will be responsible for all of the subject matters we've covered in class.I would suggest you review your mid﹣term exam and the textbooks.The final will account for 55% of your grade in the course.The research project will account for 20%,and the mid﹣term 25%.I'll be in my office almost all day on Tuesday of next week.If you run into any problems,please feel free to stop in.Good luck with your study,and I'll see you on Tuesday.