阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
If you feel stressed by responsibilities at work, you should take a step back and identify (识别)those of __1__(great)and less importance.Then, handle the most important tasks first so you’ll feel a real sense of __2__ (achieve)．Leaving the less important things until tomorrow __3__ (be) often acceptable.
