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题库 / Prep2007E1-SC-105
Even though it was not illegal for the bank to share its customers' personal and financial information with an outside marketing company in return for a commission on sales, the state's attorney general accused the bank of engaging in deceptive business practices by failing to honor its promise to its customers to keep records private.
by failing to honor its promise to its customers to keep
by its failure of honoring its promise to its customers to keep
in its failing to honor its promise to its customers of keeping
because of its failure in honoring its promise to its customers in keeping
because of its failure to honor its promise to its customers of keeping
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promise约束力强，用 to do，排除CDE
fail to do sth表示没有做某事
fail of doing表示做失败了
文中应该指银行没有维护客户信息而不是银行维护客户信息失败了
promise这里是名词吧。。。
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