38. It is implied in the passage that

　　A. urban planners should be criticized

　　B. great difficulties will arise if a city is overpopulated

　　C. an ideal city had better have a population of only 3 million

　　D. 13 million is a bad number for city planners

　　39. Which of the following statements is NOT true?

　　A. Urban industrial growth helped to give rise to cities.

　　B. The great urban industrial growth failed to provide enough food for the cities.

　　C. Technology is more important to modem industries than manpower.

　　D. Many of the new city residents will find no permanent employment.

　　40. The best title for the passage could be

　　A. Problems of Big Cities 　　　　B. Advantages of Big Cities

　　C. Solutions to City Problems 　　D. A Plan for Big Cities

　　Passage 3

　　The idea of test-tube babies may make you either delighted at the wonders of modem medicine or irritated while considering the moral, or legal, or technological implications of starting life in a laboratory. But if you've ever been pregnant(~v)~2)~)yourself, one thing is certain: You wonder what it's like to carry a test-tube baby. Are these pregnancies normal? Are the babies normal?

　　The earliest answers come from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne have taken a look at the continent's first nine successful ' in vitro pregnancies. The Australians report that the pregnancies themselves seemed to proceed according to plan, but at birth some unusual trends did show up. Seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section (剖腹产手术) . Andone baby, a twin, was born with a serious heart defect and a few days later developed life-threatening problems. What does it all mean? Even the doctors don't know for sure, because the numbers are sosmall. The proportion of girls to boys is high, but until there are many more test-tube babies noone will know whether that's something that just happened to be like that or something specialthat happens when egg meets sperm in a test tube instead of a Fallopian tube. The same thing istrue of the single heart defect; it usually shows up in only 15 out of 60,000 births in that part of Australia, but the fact that it occurred in one out of nine test-tube babies does not necessarilymean that they are at special risk. One thing the doctors can explain is the high number of Caesareans. Most of the mothers were older, had long histories of fertility problems and in some cases had had surgery on the fallopian tubes, all of which made them likely candidates forCaesareans anyway. The Australian researchers report that they are quite encouraged. All the babies are nowmaking normal progress even the twin with the birth defects.

　　41. What would people be most concerned about according to the author?

　　A. Whether the test-tube babies would be legally accepted by society.

　　B. Whether the test-tube babies would be normal from pregnancy to birth.