题目

How I regret it! ________ his advice, I ________ such a foolish mistake.（  ） A. If I have taken; wouldn’t have made     B. If I had taken; won’t have made  C. Have I taken; wouldn’t have made       D. Had I taken; wouldn’t have made   答案：D  某校有1200名学生，今年毕业200人，又新招生260人，增加学生几分之几？