题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。 There's no one reason why women return to school. Going back to school provides private and public benefits. College graduates, generally enjoy higher salaries, (employ) more consistently, and work in nicer conditions. College-educated people vote more, give more to charity, and rely (little) on government support. Making the switch from (support) to supporting oneself can be a challenge, often a necessary one. Financial (dependent) for women is key, says Nancy Schlossberg, professor 计算：（x2+x－1）·（－2x）=                   。