C. Whether modern medicine is advanced enough for test-tube babies' delivery.

　　D. Whether there would be always more girls than boys out of the test-tube babies.

　　42. what does the Latin word "in vitro"(paragraph two) most probably mean?

　　A. normal 　　B. test-tube 　　C. virtual 　　D. Fallopian tube

　　43. The Australian experiment of the test-tube babies has the following unusual trends except that

　　A. most of the babies are girls

　　B. most of the babies are delivered by means of surgical operations

　　C. there is a serious heart disease case

　　D. the babies do not appear to be normal

　　44. Which of the following explanations regarding the high number of Caesarean operations is NOT true?

　　A. Some mothers have passed the best age for a natural delivery.

　　B. Some mothers have physical problems with pregnancy.

　　C. Some mothers volunteer to be the candidates of the Caesarean operations.

　　D. Some mothers have had surgical operations on the fallopian tubes.

　　45. What is the author's attitude toward the idea of test-tube babies?

　　A. optimistic 　　B. pessimistic 　　C. delighted 　　D. irritated

　　Passage 4

　　Videodisc holds great promise of helping to meet the needs of American schoolchildren whohave problems seeing, hearing, speaking, or socializing. Almost eleven percent of the studentsaged 3-21 in this country have an impairment that affects their ability to benefit from a regulareducation program. Handicapped students require special education because they are oftenmarkedly different from most children in one or more of the following ways: mentally retarded,learning-disabled, emotionally disturbed, deaf, visually handicapped, physically handicapped,or other health impairments. The education of these handicapped children is rewarding but challenging. A special education student usually needs a longer period of time to acquire information, repetitive teaching techniques are often beneficial, and an indefatigable consistency on the part of the teacher is frequently necessary. Interactive videodisc courseware has characteristics that can be capitalized upon to meet the challenges that special education poses. A videodisc program is infinitely patient, repetition of any videodisc lesson can continue endlessly, and designers can assure absolute consistency within a program. Most important, according to special educator William Healey of the University of Arizona, is that videodisc "adds an extra dimension of realism for children who need graphic representations." Healey explained that deaf and mentally retarded children especially have difficulty grasping figurative language and higher order language concepts. He believes that for special education, the power of videodisc lies in the ability of the technology to visually represent language concepts normally taken for granted by non-handicapped persons. Complex figurative language forms such as idioms and metaphors (暗喻) come most readily to mind as being difficult for handicapped learners, but basic concepts such as are also difficult for children not experienced with the slight differences in language.