1.You may give a cold shoulder to a friend who has not kept a promise he made to you.
keep a promise 遵守诺言
He said her actions speak louder than her words; she's never kept a promise.
他说她的行动胜于言辞, 可她从不守诺.
They want to keep a promise to balance the federal budget by 2011.
他们想在2011年之前恪守平衡联邦预算的承诺 。