【正确答案】prepare

【答案解析】原文： Some of you have asked me why we need to write a leave letter, Well, sometimes you may need be absent from your work for several days. In that case, it is especially important for you to write a leave letter. It is also important to write it as early as possible so that your employer can be prepared for your leave. You should be as specific as you can about the dates. When are you going to be absent from work and for how many days? Another point is you should be honest with your boss about why you need time off. It’ s a good idea for you to discuss how your work would be taken care of when you’re absent. In your letter, you may include details about how you think your work will be taken care of.题干问你需要尽早写请假条的原因。根据原文“It is also important to write it as early as possible so that your employer can be prepared for your leave.”可知,你尽早写请假条可以让雇主做准备。所以此处应填prepare。