promise的用法例句：
1. The boy first showed promise as an athlete in grade school.
这个男孩在上小学的'时候就初次显示出成为运动员的潜力。
2. I'm hoping you'll keep your promise to come for a long visit.
我希望你遵守诺言来这儿多呆几天。
3. President Kaunda fulfilled his promise of announcing a date for the referendum.
卡翁达总统兑现了他的承诺，宣布了全民公决的日期。
4. This approach, more than any other, holds promise for true reform.
这一方法比其他任何方法都更让人看到真正改革的希望。