原帖由 Lois 于 2009-2-4 22:39 发表 " Q- t+ n9 T' i) |. b uyou are wrong, and your friend is also wrong. 9 X5 v: U* X; Z4 f) G2 R* Xit has always been 1 year.
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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?