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 The boy     English on the radio when I     his door. A.learned... was opening B. was learning......

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English    a English    an English    English boy  
a English boy    boy    an English    English  
a    an  the   /  
America; England   English; America   American; English   England; America  
so that    even though    as though    now that  
learning; to speak    learning; speaking    to learn; to speak    to learn; speaking  
so that    even though    as though    now that  
if    because    although   so  
English; Chinese    an English; China    English boy; Chinese boy    a English; a China  
so that    even if    now that    as though  
English, Chinese    an English, China    English boy, Chinese boy    a English, a China  
an; /; The    an; the; The    a; /;A.    a; a;A.  
if    though    because    unless  
an    a    the    /  
so that    even though    as though    now that  
America;English   America;England   American;English   American;England  
at    in    to    on