题目内容
一旦你承诺要做某事， 就要守信用。 （once）
Once you promise to do something, you ought to keep your words.
Once you’ve made a promise, you should keep it.
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一旦你承诺要做某事， 就要守信用。 （once）
Once you promise to do something, you ought to keep your words.
Once you’ve made a promise, you should keep it.
阅读快车系列答案