A．New languages will be created.

B．People's lifestyles are reflected in languages.

C．Human development results in fewer languages.

D．Geography determines language evolution.

　　　　　　　　　　　　　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 mater. 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 bilinguals who had learnt a second language before the age of five，as well as a number of later learners.

Scans showed that grey mater density(密度) in the brain was greater in bilinguals than in people without a second language.

"Our findings suggest that the structure of the brain is changed by the experience of learning a second language，" said the scientists. It means that the change itself increases the ability to learn.

Professor Dylan Vaughan Jones of the University of Wales，has researched the link between bilingualism and maths skills. "Having two languages gives you two windows on the world and makes the brain more flexible，" he said. "You are actually going beyond language and have a better understanding of different ideas."

The findings were matched in a study of native Italian speakers who had learned English as a second language between the ages of two and thirty－four. Reading，writing，and comprehension were all tested. The results showed that the younger they started to learn，the better. "Studying a language means you get an entrance to another world，" explained the scientists.

29.The main subject talked about in this passage is__C__.

A．science on learning a second language

B．man's ability of learning a second language

C．that language can help brain power

D．language learning and maths study

30.A bilingual means a person who__C__.

A．researches language learning

B．can only speak English

C．can speak two languages

D．learned a second language at an early age

31.We may know from the scientific findings that__A__.

A．whether you learn a foreign language does make a difference in your grey matter