原帖由 annie66 于 2009-2-4 21:03 发表 3 n+ \9 t' x+ B, S! s" D( E I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
" I$ W4 i( J: N* s6 V! v 7 J ]/ Q% S' m, R3 CI 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?