Today's Sentence
Video not in English?We used to think that tool use was our defining human characteristic, until we saw chimps do it.
Original Video:Will We Ever Run out of Oil?
Key Vocabulary
1. characteristic
characteristic
[ˌker.ək.təˈrɪs.tɪk](n.)

Claire Wu4 months ago
URA2 months ago
Eason Lee (EasonLee)2 months ago
lily jiang 3 months ago
Derek Chang3 months ago
HS3 months ago
el4 months ago
MariaSan4 months ago
soleilwang01174 months ago
Hsing-Sheng Wang4 months ago
Total
3103
Challenges Completed