People who cannot _____ between colours are said to be colour-blind.
The last thirty years _________ the quick development in almost every field in China.
A good friend is a person who you can _______ in your hour of need.
______ is widely acknowledged that all mankind is created ______.
______ of the land in Jinhua No. 1 High School _______ covered with trees and grass.
—— How was she ? —— Terrible. She was shocked ______ what happened to her son.