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O trang web nay`, cac' ban co' the lam cac bai tap dang trac nghiem voi' cac' mon hoc danh cho ca~ 3 khoi', cac dang trac nghiem deu` duoc chia ra Co ban~ va` Nang cao nen cac ban dung` lo. Nhung o khoi' 10 thi` chi~ moi' co' mot so mon chua duoc day` du lem' nhung co' con` hon ko. dung kon?.