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 1.________.They are purple and 2.________.But the grapes are high.The fox 3.________get and eat them.A bird can eat the grapes.She likes the sweet grapes.The fox is 4.________and angry. He says those grapes are sour. They are not 5.________.