1.You may give a cold shoulder to a friend who has not kept a promise he made to you.
keep a promise 遵守諾言
He said her actions speak louder than her words; she's never kept a promise.
他說她的行動勝于言辭, 可她從不守諾.
They want to keep a promise to balance the federal budget by 2011.
他們想在2011年之前恪守平衡聯邦預算的承諾 。