原帖由 annie66 于 2009-2-4 21:03 发表 ) J8 P9 L# Q+ Q- n4 e2 E0 f* C I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
3 N& V7 y" S X6 ?. p0 S/ dI 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?