viết về môn học em cảm thấy khó nhất bằng tiếng anh ,trong đó có sử dung các thành ngữ "Achille heel"

It has never been easy to study math well in any grade, high school, middle school or grade I. Therefore, in grade 8 is no exception, math is also a subject that worries many students and faces many difficulties in the learning process. In this math subject, from theory to exercises are not easy, to firmly learn the basics requires students to have a careful preparation and concentration, not neglect, subjective, to know the product. accumulate knowledge one by one, get a lot of experience from teachers' lectures as well as draw it out yourself. To be good, not only have a basic grasp, but also have to know how to improve their knowledge, challenge themselves with more difficult knowledge, more advanced exercises.

cho mình xin ctlhn nhé