原帖由 Lois 于 2009-2-4 22:39 发表 + Z) j) i2 P& h) a/ f/ Hyou are wrong, and your friend is also wrong. 7 \, z2 O4 X- t/ F: `; ?9 A. nit has always been 1 year.
* t- n/ F h) M; L6 B& 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?