原帖由 annie66 于 2009-2-4 21:03 发表 . q' O) O, z! z2 l" G& U) ^8 u% i I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
$ v- e" j: D( {+ z4 m0 v 2 g1 ~1 m/ R7 f, F3 AI 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?