已知(   )

阅读短文，选出合适的词，将单词写在横线上。

sad, sweet, grapes, cannot, round

    One day，a fox sees some nice____．They are purple and____．But the grapes are high．The fox____get and eat them．A bird can eat the grapes．She likes the sweet grapes．The fox is____and angry. He says those grapes are sour. They are not____.

计算：|π﹣3.14|⁰﹣ $\sqrt{8}$ +（﹣ $\frac{1}{3}$ ）^﹣2+2sin45°=____．

Sometimes it was a bit boring to work there because there wasn’t always ______ much to do. 

良好的饮食习惯与合理均衡的营养能促进身体的生长发育，增强对疾病的抵抗力。下列四种习惯中属于不良习惯的是（    ）