原帖由 annie66 于 2009-2-4 21:03 发表 6 g. K/ {, V( \* T4 r; K2 |/ e I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
1 F" t, ?0 \5 r6 {" F) g1 X # s$ H3 l, A( X( w0 yI 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?