时态要一致:I found that academic performance is no longer , is 应该改成"was”。人称要一致: You have to enhance your comprehensive quality,应该跟前面的人称统一,为 " I "。school clubs,是想讲社团吧,应该叫associations。landscape company ,是想将旅游公司吧?应该是tourism company。其实下面的都还有一些问题,可以先给英语比较好的人看看,问问意见,慢慢修改。