You are fluent in this language (and don't even know it) | Christoph Niemann level = 14 2:18 on 2018/08/26
Test 1 Part 3 ETS 2016 - Question 41 through 43 refer to the following conversation level = 13 0:49 on 2018/08/21
What your smart devices know (and share) about you | Kashmir Hill and Surya Mattu level = 15 1:31 on 2018/08/20
