原帖由 annie66 于 2009-2-4 21:03 发表 ! z& K" Z7 C4 b `- L r5 B8 r I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
, n* M' k3 l: z# h) X3 nI 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?