题目

短文填空 根据短文内容和以下提示：1）首字母提示，2）汉语提示，在每个空格内填入一个适当的英语单词。所填单词要求意义准确，拼写正确。（10分） Dear editor, I am a high school student. I'd like to tell you something about    78. _ friend, Wu Gang. A few days ago, he told me that he was going to stop school. He said that he wanted to start his own business. I tried my 79       to get him to change his mind. However, I know it's difficult 80. f        him to change his mind. He studies hard, 81.b      he doesn’t d已知实数x，y，满足约束条件则z=2x+y的最小值为    ．