原帖由 Lois 于 2009-2-4 22:39 发表 7 y) O+ Q$ \8 j& \, c( n" \0 Vyou are wrong, and your friend is also wrong. 4 S! J# Y, o n7 {) i2 A$ Cit has always been 1 year.
3 v$ S/ r v u6 ^9 ?! \I 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?