Lesson 18 - Exercise 2 - Peter and Steve

Watch the video, then answer the question.

Verbs: know, appear
Adjectives: machine-like, outgoing, biased, efficient
idiom: "let (their) hair down"
Tap on any word once (mobile), or double-click on any word (computer), to read an English definition.
If you need an approximate translation to your own language, the Google Translate button is available at the top of the screen.