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
____.
