原帖由 annie66 于 2009-2-4 21:03 发表 " e$ ~$ C$ W g+ E+ |# o, G0 H I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
原帖由 Lois 于 2009-2-4 22:39 发表 8 U) `: x/ d* l3 l- kyou are wrong, and your friend is also wrong. ) u3 U$ X1 H& K. c2 ^8 U6 Y' `it has always been 1 year.
8 K3 r7 m* Q1 G4 R4 a6 z: K& h ( }4 Y8 q, @: b; s) g: wI 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?