题目

Not only ______interested in football but ______beginning to show an interest in it. A. the teacher himself is … all his students areB. the teacher himself is …are all his students   C. is the teacher himself …are all his students    D. is the teacher himself …all his students are 答案：D 解析: D not only …but (also )连结两个句子，用部分倒装。在（x+y）n的展开式中，若第七项系数最大，则n的值可能等于（　　）A．13，14B．14，15C．12，13D．11，12，13