3.

　　We are used to the idea of aging in ourselves. We are so used to this that it comes as a surprise to find that there may be some animals that do not age. Sea anemones(海葵) are an example. Some have been kept for nearly a century without showing any signs of lifelessness. Some kinds of sea worms can even “grow backwards.” If kept in the dark and given nothing to eat, they get steadily smaller, They finally end as a ball of cells(细胞) looking rather like the egg from which they came. Under good conditions the ball will turn back to a worm and start growing again. One could probably keep them growing and un-growing again and again.

　　1. Some sea worms grow smaller when they ______.

　　A. lose weight B. live in the darkness

　　C. are under good conditions D. don’t eat and are kept in the dark

　　2. According to the passage, some sea animals ________.

　　A. will die when they become a ball of cells B. do not grow old

　　C. will die without food D. will stop growing any time they want

　　3. According to the passage, which of the following statements in NOT true?

　　A. We can keep certain kind of sea worm growing and ungrowing again and again.

　　B. Human beings will grow old and die.

　　C. An anemone is a king of sea worm that can grow backwards.

　　D. Some anemones will live nearly a hundred years.

　　4. The underlined word aging in the first sentence means ______.

　　A. growing old B. the age of a person C.getting younger D. un -growing

　　5. This passage is mainly about ______.

　　A. sea animals B. cells C. aging D. anemones

　　4. Now I’d like to talk to you about your final exam. The exam will be held next Thursday, the last day of the exam week. Remember to bring two of three pens in case you run out of ink. And unlike the midterm exam, this test will not include multiple --- choice questions; it will consist entirely of essays(文章). You’ll have to answer three of the five essay questions. The exam will be comprehensive (全面的), which means you’ll be responsible for all of the subject matters we covered in class this term, I would suggest you review your midterm exam as well as textbooks and your class notes. The final exam will count as 50 percent of your grade of the course. The research project (项目) will count as 20 percent and the midterm exam 30 percent. I’ll be in my office almost all day next Tuesday. If you run into any problems, please drop in. Good luck to you and I’ll see you on Tuesday.

　　1. When will the final exam take place?

　　A. On Tuesday B. On a Wednesday C. On a Thursday D. On a Friday

　　2. What will be included in the exam?

　　A. There will be only multiple-choice questions.

　　B. The exam will contain both multiple-choice and essay questions.

　　C. The exam will have an oral and a written section. D. There will be only essay questions.

　　3. Why does the teacher call the exam comprehensive?

　　A. It will be easy to understand. B. Students will be tested on all the material discussed in class.

　　C. It will cover topics from a wide variety of subjects. D. Students must complete all parts of it.

　　4. The underlined phrase run into probably means .

　　A. go into B. meet somebody unexpectedlyC. come up against something with force D. come across

　　5. When was this talk most likely given?

　　A. During the first week of class B. During midterm week

　　C. On the last day of classD. On the last day of exam week