原帖由 annie66 于 2009-2-4 21:03 发表 0 U. T3 Q. g/ \ C2 }& D7 l7 N I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
6 ?+ P5 S( q$ v* f* T& r' PI 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?