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Don’t forget the day ____ you were received into the Youth League.

A. when              B. that              C. at which          D. where

 Don’t forget the day ____ you were received into the Youth League.

       A. when                   B. that                       C. at which        D. where

Don’t forget the day ____ you were received into the Youth League.

A. when 　 B. that 　 C. at which 　 D. where

Don’t forget the day ____ you were received into the Youth League.

Don’t forget the day _____ you were received into the Youth League.

　 A. when 　 B. that

　 C. at which 　 D. where