1. Ok2. ...."more the double". 意思完全说不通。 是....."more than doubled" 吧3. 语法错:过去时。.....I found that I "had made" five mistakes.4. has "raised"或 has been "rising"
第四句has been risen
第四句has been risen rise貌似是不规则变形,第一句不太肯定,要不要改成as a editor