What actually __________ a good angle — or a good selfie overall — is rooted in what we consider beautiful.

We can hear （）from the back of the room.

Itisnotuncommonforthere_____problemsofcommunicationbetweentheoldandtheyoung.

Theteachers’union_________alawsuitagainstthedistrictcallingforrepairing“deplorable”schoolconditions.

Underthis____pressuresomeoftherocksevenbecameliquid.