Underline and correct ten mistakes in the following passage. Write the corrections in the space given below.

Thanks for the field of linguistics we know little about the development of the 5,000 plus languages in exist today. We can describe their grammar and pronunciation and see how their spoken and writing forms have changed over time. For example, we understand the origins of the Indo-European group of languages, which includes Norwegian, Hindi and English, and can trace them down to tribes in eastern Europe in about 3000 BC.

So, we have mapped out a great number of the history of language, but there are still areas we know little about. Experts are beginning to look to the field of evolutionary biology to find out what the human species developed to be able to use language. So far, there are far more questions and half-theories than answers.

We know that human language is far more complex than those of even our nearest and most intelligent relatives like chimpanzees. We can express complex thoughts, convey subtle emotions and communicate about abstract concept such as past and future. And we do this following a set of structural rules, called as grammar. Do only humans use an innate system of rules to govern the order of words? Perhaps not, as some research may suggest dolphins share this capability so they are able to recognize when these rules are broken.

(adapted from learnenglish.britishcouncil.org)

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