他自从来到美国之后就一直收听英语节目，因此他取得了很大进步。
He has been listening to English program since he came to the U. s., so he has made great progress.
鲍勃·道蒂：你正在收听慢速英语，美国故事。
BOB DOUGHTY: You have been listening to the Special English program, American Stories.
鲍勃·道蒂：你正在收听慢速英语，美国故事。
BOB DOUGHTY: You have been listening to the Special English program, American Stories.
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