41．D　细节理解题。根据倒数第三段“But in fact they ‘lacked any grounding in science’ and were of no use.”可知，事实上它们“在科学上没有任何根据”，是没有用的。可以判断选D。

　　42．C　推理判断题。根据倒数第二段“McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.”及最后一段可知，麦考密克曾在法庭上说，他出售自己的探测器给肯尼亚警察、香港监狱、埃及的军队和泰国的边境管制处， 而且他从来没有从客户那里听到任何不好的结果。故可以推断出他根本没认识到他的罪行。故选C。

　　If English means endless new words，difficult grammar and sometimes strange pronunciation, you are wrong. Haven’t you noticed that you have become smarter since you started to learn a language?

　　According to a new study by a British university，learning a second language can lead to an increase in your brain power. Researchers found that learning other languages changes grey matter. This is the area of the brain which processes information. It is similar to the way that exercise builds muscles.

　　The study also found the effect is greater when the younger people learn a second language.

　　A team led by Dr.Andrea Mechelli，from University College London，took a group of Britons who only spoke English. They were compared with a group of “early bilinguals” who had learnt a second language before the age of five，as well as a number of later learners.

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