The invention provides nine oligonuleotides with sequences of SEQ ID NO:1-9 or their functional homologues or a composition comprising the same and a method for treating B cell neoplasm by using the oligonuleotides or their functional homologues or the composition comprising the oligonuleotides. The oligonuleotides induce the apoptosis of B cell neoplastic cells, up-regulate CD40 on B cell neoplastic cells and stimulate the production of IL-10 from B cell neoplastic cells.
