Prof Yu,where is your lesson 18 and 19? Wahaha.

所有跟帖： 

• I am still working on Lesson 18, hoping to start Lesson 19 soon. -EnLearner- ♀ (0 bytes) () 08/28/2011 postreply 21:01:38

• how about you? hahaha -非文學青年- ♀ (0 bytes) () 08/28/2011 postreply 22:38:20

• 還是愚公善良。haha -beautifulwind- ♀ (0 bytes) () 08/28/2011 postreply 22:43:50

• 我是不在其位，不謀其政哈。 -EnLearner- ♀ (0 bytes) () 08/29/2011 postreply 19:22:33