Look! Serveal __ are watching a group of ___ eating grass on the hill.

Lina didn’t get there on time because of the bad weather, what’s more, her car was in poor          .

My mom’s __________ determined me to go on with my study.

It is widely accepted that animals learn to do things because their certain acts lead to _______.

Finding information in today’s world is easy．The_______is how you can tell if the information you get is useful or not。