Ⅲ. 标出主题句（15 points, 5 points each）

　　16. Choose the best topic sentence from the group below.

　　A. Picasso was thought to be dead at birth in Malaga on. Oct. 25, 1881.

　　B. By the age of 25, Picasso was an able and gifted artist.

　　C. Picasso’s father was a painter named Jose Ruiz Blasco.

　　D. The full sweep of Picasso’s effect on modern art is difficult to document.

　　Answer: ___________

　　17. Read the following paragraph and underline the topic sentence.

　　There is a popular belief that some particular scientific discoveries or theories, such as the Darwinian theory of evolution, have led to the downfall of religion. It would be foolish to deny that these discoveries have had a great effect in undermining religious dogma. But this account does not at all go to the root of the matter.  Religion can probably outlive any scientific discoveries which could be made. It can accommodate itself to them. The root cause of the decay of faith has not been any particular discovery of science, but rather the general spirit of science and certain basic assumptions upon which modern science, from the 17th century onwards, has proceeded.

　　18. Read the following paragraph carefully and select the best topic sentence from the four possible answers that follow the paragraph.

　　Topic sentence ___________

　　At one time, transistor radios were not practical, because they were too expensive, Now all of that has changed. With the reduced price of transistors and the cheaper costs of mass production, the transistor radio is cheaper than the old-style tube model. In addition, transistor radios do not heat up like the old tube radios, so they will not wear out as quickly. Also, transistor radios can be made much smaller because transistors are smaller than tubes. Furthermore, transistor radios are more reliable. They have fewer parts, so less can go wrong.

　　A. Transistor radios are practical and inexpensive.

　　B. Transistor radios have undergone much improvement.

　　C. Transistor radios are cheaper than tube radios because of mass production.

　　D. Transistor radios are better than the old-style tube radios.