영어 작문 수행인데 이거 문법적으로 문맥적으러 맞는지 특히 관사나 복수,단수,접속사,어휘 등등 봐주세요영어 전문가님들ㅠ!

One of the difficulties I’ve had was making mistakes in school exams.I studied hard to get a good score on the school exams.But I often made mistakes on the exams because I was not meticulous about the questions or answered them quickly. As a result, I missed a few questions I could’ve solved.In order to overcome this difficulty,I decided not to solve the problems quickly. Then,I practiced carefully checking the questions twice.I also practiced allocating my time efficiently during practice tests. By practicing time management in advance,I was able to reduce mistakes in the actual exams. Through this experience , I learned it’s more important to get the answers right ,than to solve them quickly