The passage below contains 10 mistakes. Identify and correct the mistakes. Write you in the box provided. All languages change over a period of time, for reasons which are imperfectly understood. Speech is really such integral a form of human activity that it cannot be regarded as an entity in itself. With this reason, it is more exact to say that each generation behaves linguistically in a slight different manner from its predecessors. Young people are impatient of how they often consider to be the stilted vocabulary and pronunciation of his elders, and like to show how up-to-date they are by using the latest slang. Moreover, as the years go by, some of that slang becomes standard usage. In any case, people slowly grow far less receptive to linguistic novelties, so that by the time they reach their forty, they decry the slovenly speech of the younger generation. In this respect, language is a little alike fashions in dress. The informal clothes of one generation become the everyday wear of the next. Similarly, just as much young doctors and office workers carry out their duties in casual clothes, so expressions which were once confining to slang and familiar conversation are assimilated into their normal vocabulary.