The researchers checked the activity of 11，000 genes from the mouse livers．a(chǎn)nd found that 46 changed with age in the normally fed mice．The changes were associated with things like inflammation and free radical production（A錯(cuò)誤）--probably bad news for mouse health．（In the mice that had dieted all their lives，27 of those 46 genes continued to behave like young genes．But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 per cent of these gene changes．）
4.According to the author，which of the following most interested the researchers?
A) The mice that started dieting in old age．
B)27 of those 46 old genes that continued to behave like young genes．
C)Calorie restriction that works in people．
D)Dieting that makes sure a drug is effective．
4． A。 分析：借助題干中出現(xiàn)的修飾詞most interested 和核心詞researchers作為答案線索，同時(shí)注意被選項(xiàng)中出現(xiàn)的核心結(jié)構(gòu)，這樣找到答案相關(guān)句：
The researchers checked the activity of 11，000 genes from the mouse livers．a(chǎn)nd found that 46 changed with age in the normally fed mice． The changes were associated with things like inflammation and free radical production--probably bad news for mouse health．In the mice that had dieted all their lives，27 of those 46 genes continued to behave like young genes．But the most surprising finding（該結(jié)構(gòu)與題干中的most interested呼應(yīng)）was that the mice that only started dieting in old age also benefited from 70 per cent of these gene changes．該句暗示A比更能讓研究者感到興趣，因?yàn)榫渥又杏昧薽ost surprising的結(jié)構(gòu)
“This is the first indication that these effects kick in pretty quickly,” says Huber Warner from the National Institute on Aging near Washington，D．C．．
No one yet knows if calorie restriction works in people as it does in mice, but Spindler is hopeful．（該句否定了C）“There’s attracting and tempting evidence out there that it will work．”he says．
If it does work in people，there might be good reasons for rejuvenating the liver．As we get older, our bodies are less efficient at metabolizing drugs，for example．A brief period of time of dieting，says Spindler, could be enough to make sure a drug is effective．
4.According to the author，which of the following most interested the researchers?
A) The mice that started dieting in old age．
B)27 of those 46 old genes that continued to behave like young genes．
C)Calorie restriction that works in people．
D)Dieting that makes sure a drug is effective．
4． A。 分析：借助題干中出現(xiàn)的修飾詞most interested 和核心詞researchers作為答案線索，同時(shí)注意被選項(xiàng)中出現(xiàn)的核心結(jié)構(gòu)，這樣找到答案相關(guān)句：
The researchers checked the activity of 11，000 genes from the mouse livers．a(chǎn)nd found that 46 changed with age in the normally fed mice． The changes were associated with things like inflammation and free radical production--probably bad news for mouse health．In the mice that had dieted all their lives，27 of those 46 genes continued to behave like young genes．But the most surprising finding（該結(jié)構(gòu)與題干中的most interested呼應(yīng)）was that the mice that only started dieting in old age also benefited from 70 per cent of these gene changes．該句暗示A比更能讓研究者感到興趣，因?yàn)榫渥又杏昧薽ost surprising的結(jié)構(gòu)
“This is the first indication that these effects kick in pretty quickly,” says Huber Warner from the National Institute on Aging near Washington，D．C．．
No one yet knows if calorie restriction works in people as it does in mice, but Spindler is hopeful．（該句否定了C）“There’s attracting and tempting evidence out there that it will work．”he says．
If it does work in people，there might be good reasons for rejuvenating the liver．As we get older, our bodies are less efficient at metabolizing drugs，for example．A brief period of time of dieting，says Spindler, could be enough to make sure a drug is effective．