原帖由 annie66 于 2009-2-4 21:03 发表 ) e. S1 Z8 a2 S( `! |: @' _) a I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
: r d7 d0 a. v5 _1 U0 A) R5 z 9 U5 C. [7 }* m tI 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?