词：sidetrack
英英释义：to direct (someone) away from an activity or subject toward another one that is often less important
例句： Sorry I got completely sidetracked and didn't attend to your request immediately.
1）翻译下面的句子：
约翰本来想找一个信封，但没想到读起了一些旧时的信件。
John was looking for an envelope at first，but got sidetracked and began to read some old letters.
………but got sidetracked on old letters.
（参考翻译：John was looking for an envelope and got sidetracked reading some old letters.）
造句：
背景：
为了能够准时完成作业，她尽力想要集中精力，但失败了：她开刷了一堆明星八卦。
句子：
In order to get her homework done on time, she had tried hard to focus，but failed: she got sidetracked on gossips of superstars.
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