Watch a TV series! I guarantee your English will improve much quicker!
Great Movie Musicals make for great Lesson Materials for learning English
These are not arranged in a special order, such as "best" or anything like that.
"Oliver!" 1968 http://www.imdb.com/title/tt0063385/
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"My Fair Lady!" 1964
http://www.imdb.com/title/tt0058385/?ref_=fn_al_tt_1
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"The Sound of Music" 1965
http://www.imdb.com/title/tt0059742/
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"The Music Man" 1962 http://www.imdb.com/title/tt0056262/?ref_=fn_al_tt_1
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"West Side Story" 1961 (based upon William Shakespeare's "Romeo and Juliet")
http://www.imdb.com/title/tt0055614/?ref_=fn_al_tt_1
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"Camelot" 1967 http://www.imdb.com/title/tt0061439/?ref_=fn_al_tt_2
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"State Fair" 1962 http://www.imdb.com/title/tt0056526/?ref_=fn_al_tt_1
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"The King and I" 1956 http://www.imdb.com/title/tt0049408/?ref_=fn_al_tt_1
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"Mary Poppins" 1964 http://www.imdb.com/title/tt0058331/?ref_=fn_al_tt_1
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Thank you all :)