2是对的
有没有倒装 你就看看去掉not only,和你平时的正常语序有区别吗?
倒装就是把助动词do did does、情态动词can may could这些提到主语前面
如：
Not only did he come,but he saw her.他不仅来了,而且还见到了她.
Not only does she speak Spanish,(but) she also knows how to type.她不但会说西班牙语,还会打字呢.
Not only is he a teacher,but he is also a poet.他不仅是一位教师,而且是一位诗人.
Not only did he speak more correctly,but he spoke more easily.不仅他讲得更正确,也讲得更不费劲了.
Not only did they present a musical performance,but they also gave a brief introduction to the history of Western brass instruments.他们不但做了音乐表演,而且简短地介绍了西方铜管乐器的历史.