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My     improved a lot by listening to the conversations in English movies. (pronounce)

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improve  to be improving  to he improved  to have improved  
improved    was improved   has improved    has been improved  
quality    schedule    principle    guidance  
have improved    improved    will improve    am improving  
to improve  to be improved   improved  improve  
how quickly; is improved    How quickly; has improved    how quick; has improved    what quickly; has improved  
since    while    when    as  
unless    while    when    as  
concerning  to concern  concerned  concern  
unless    while    when    as