你们没做google voice recording 的， 请做完作业。我们今天又练习了17的main language points, including how to use " ...就要。。。了“，and also how to use " ...的时候“ vs. "什么时候？“。你们要知道怎么用这些句型（sentence patterns）. We are going to have a quiz next class ( Oct. 1, Monday)on Lesson 11, so please make sure you prepare well．

再见