原帖由 annie66 于 2009-2-4 21:03 发表 * J* | t; h4 K. Q5 X5 e) [. T& G9 p I'm sure you haven't had Class 7 yet. If you read learner's book, you will know the answer.
) S4 m3 ] {+ T+ y% _, F( H" I2 kI 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?