原帖由 annie66 于 2009-2-4 21:03 发表 2 V d9 K% ^- Y/ U/ ]: b5 C% v I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
3 `- {4 O! Q+ X2 e8 O " C& B9 X/ J! a+ XI read the learner's book 5 years ago, which said one year holding time of class 7 to class 5. Did you take the exam 6 years ago?