【Unused Problem Set】 Winning English for 1st Year Junior High School Students I purchased a new copy because I thought I had lost the answer key, but I found the original answer key soon after. I've only flipped through the new answer key about twice. The problem set itself is unused. The answer key appears to have some slight page-turning marks. Although the problem set is completely unused, it has been stored at home, so please refrain from purchasing if you are concerned about minor details. This problem set is not available in general bookstores. It is only handled by some cram schools and private junior and senior high schools. It is a great English learning material for private junior high school students, as well as public junior high school students, to learn the basics thoroughly. Shipping will include waterproof packaging.