When he saw we were upset he began to us for hours with his stories and jokes.A. encoura

问题补充：

When he saw we were upset, he began to us for hours with his stories and jokes.

A. encourage

B. educate

C. entertain

D. astonish

答案：

A. encourage

B. educate

(答案→)C. entertain

D. astonish

解析： 词义辨析。encourage鼓励；educate教育；entertain娱乐，使高兴；astonish

使震惊。句意：当他看到我们很沮丧时，他开始用故事和笑话让我们开心了几小时。所以选C。