10．Human cloning technology could be used to reserve heart attacks．Scientists believe that they may be able to treat heart attack by cloning their healthy heart cells and injecting them into the areas of the heart that have been damaged，and other problems may be solved if human cloning and its technology are not forbidden．
With cloning，infertilecouples could have children．Current treatments for infertility，in terms of percentages，are not very successful．Couples go through physical and emotionally painful procedures for a small chance of having children．Many couples run out of time and money without successfully having children．Human cloning could make it possible for many more infertile couples to have children than ever before．
We should be able to clone the bone marrow（骨髓） for children and adults suffering from leukemia（白血�。甌his is expected to be one of the first benefits to come from cloning technology．We may learn how to switch cells on and off through cloning and thus be able to cure cancer．
Cloning technology can be used to test for and perhaps cure gene-related diseases．The above is just a few examples of what human cloning technology can do for mankind．This new technology promises unprecedented （前所未有的）advancement in medicine if people will release their fears and let the benefit begin．

44．What does the underlined word"infertile"（paragraph 2）most probably mean？C
A．with physical and emotional problems
B．short of time and money
C．unable to give birth to children
D．separated from each other for a long time
45．According to the text，one of the first expected benefits from cloning technology is inB．
A．the treatment of mental diseases
B．the reserve of heart diseases
C．the cure of gene-related diseases
D．the bearing of babies
46．According to the writer，the main problem with the development of human cloning technology is thatD．
A．it has brought about benefits so far
B．it may be out of human control
C．people still know little about it
D．people are afraid of such technology．

分析 這篇文章介紹了克隆技術給人類會帶來的好處：有治療疾病，幫助不孕不育的父母，延緩心臟病等，但首先是人們要克服對這項技術的恐懼．

解答 44．C．詞義猜測題：從第二段的句子：With cloning，infertile couples could have children．可知有了克隆技術不孕不育的父母就可以有孩子了，可知infertile 意思是：unable to give birth to children 選C．
45．B．細節(jié)理解題：從第一段的句子：Human cloning technology could be used to reserve heart attacks．可知克隆技術可以用來延遲心臟病，所以選B．
46．D．推理判斷題：從文章的最后一段的句子：This new technology promises unprecedented （前所未有的）advancement in medicine if people will release their fears and let the benefit begin．如果人們消除恐懼這項技術會有醫(yī)學上前所未有的進步，可以推斷出克隆技術發(fā)展的主要問題是人們害怕這項技術．所以選D．

點評 考察學生的細節(jié)理解和推理判斷能力，做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．

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B．Because he was rude to his father that morning．
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