原帖由 annie66 于 2009-2-4 21:03 发表 - i+ \! L" v9 C3 b' v; J- s ` I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
7 z+ v4 k! d+ K5 A3 ^$ U- U 6 ~6 I* _6 t b( hI 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?