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re birth or problems during childbirth can sometimes harm the baby’s developing brain．while premature babies are generally fine，there is a greater chance that they may have mental retardation．
1n some cases．a young child can develop mental retardation after being sick with a serious infection or other illness．or after suffering a bad head injury．
36. A child can be taken as mentally retarded．f he or she
A. was born prematurely．
B. has lower than normal intelligence．
C. has low intelligence and low daily living skills•
D. has normal intelligence but difficulties in learning
37.A person of high intelligence will probably score
A. above 110 on an IQ test． B. 110 on an IQ test.
C. 90 on an IQ test． D. below 75 on an IQ test.
38. Which Of the following is NOT true of mental retardation?
A. It is not curable．
B. Its victims are usually born with it．
C. Its causes are not fully identified yet．
D. It can spread among family members
39. Which is NOT a possible cause of mental retardation?
A. Alcohol or drug abuse． B. Abnormal genes from the parents，
C. A well-•planned pregnancy． D. Problems during childbirth．
40 .The word “While” in Line 4 from the bottom can best be replaced by
A .Unless B. Because C. Since D. Although．
第三篇 Many Older Doctors Plan to Phase out Their Practice
The results Of a new survey indicate that 48 percent of physicians between 50 and 65 years Of age are planning to reduce or end their clinical practice in the next。l to 3 years．The findings also suggest that many older physicians believe that their younger counterparts do not have the work ethic they do．
The survey，which was conducted by Merritt Hawkins＆Associates，a Texas-based physician search and consulting firm，suggests that many older physicians are simply unhappy with the changes that have taken place in medicine over the Years•
“When Baby Boom doctors entered medicine they had control over how they practiced and the fee they charged．But the rules changed on them in mid’stream and now many are looking for a ticket out，”Mark Smith，executive vice president of Merritt Hawkins＆Associates，said in a statement．
“Our study is the only one I am aware of that examines the career plans of
physicians in the 50-To-65 age group．”This age group represents more than One-third of all physicians in the U．S．If they stop working in the coming years，It will have a “significant impact”on the overall supply of physicians，Smith told Reuters Health_.
The results of the survey，which included 1,170 respondents(调查对象)，show that 24 percent Of older physicians are planning to leave clinical practice all together In the next 1 to 3 years．Specifically，1 4 percent said they were planning on retiring，7 percent said they were looking for a medical job a non—patient care setting，and 3 Percent said they were seeking a job in a non—medical field．
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For those physicians not leaving clinical practice，many said they would make changes to reduce the number of patients they treat．For instance，12 percent said they would begin working part—time，8 percent said they planned to stop taking new patients Or markedly reduce their patient load，and 4 percent expressed a desire to work on a temporary basis.
When asked about the work ethic of physicians entering practice today，68 percent of the respondents said that these younger doctors are not as dedicated Or as hard working as physicians w