You can buy "The Complete Solution to the Seventh Grade Volume II of the Middle School Textbook" online, but it was printed in 2008, because the next semester in 2009 has not arrived yet. The answer is for your reference. You can also buy "Three Point One Test" and "Textbook Interpretation", which are also better and best-selling teaching AIDS in the market, and there are also answers in them. I suggest you buy a "textbook explanation", because there are not only answers, but also analysis and presentation. I don't think you need an e-book, because after all, the content is entered, and there may be mistakes or mistakes, which will bring you inconvenience.