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The more one is ______the English-speaking environment, the better he or she will learn the language.

       A. exposed to        B. filled in     C. caught on D. kept up

The more one is ______the English-speaking environment, the better he or she will learn the language.

       A. exposed to           B. filled in         C. caught on        D. kept up

The more one is _________ the English-speaking environment, the better he or she will learn the language.

       A. exposed to         B. filled in                     C. caught on                 D. kept up

The more one is _________ the English-speaking environment, the better he or she will learn the language．

A. exposed to              B. filled in                   C. caught on                   D. kept up

The more one is _______ the English-speaking environment, the better he or she will learn the language.