Many non native speakers have not opportunity to practice the English language in their motherlands. English also do not only used in the classroom. If the learners live in an English- speaking country, the learners will have opportunities to listen and speak with native speakers of English. Conversely, there will no advantage for learners if they live in a non English speaking country. Kenworthy (1987) insists that exposure can be a contributory factor but it is not necessary factor for developing adult learners' pronunciation. Learners should make use of it is opportunities, if they are aware of the necessity of being exposed to the second language. If the learners do that, they will be more successful in case of improving their pronunciation.This factor affect the pronunciation of most Asian adult students in a bad way if the learners have negative attitudes for the English environment .learners or they are introverted students. From my own experience as a student in the UK, I am one of the students who are introverted or shy. Therefore, I usually do not take part in classroom activities; seminars and tutorials .Whereas extrovert students have more chance to improve their pronunciation. Brown (2001) states attitude of the students toward the new language have an effective role in pronunciation learning. Also, if the learners have a good attitude for the target culture, they can develop their pronunciation accurately. If the learners have some prejudices on the second language and its society, this event will influence their approach to the language.