Inferences
Amy did not want to leave her friends house. She would not be able to see her again for a long time. How did she feel?
She was sad, she will miss her friend.
Jacob thought that the math homework was a piece of cake. What does that mean?
It is in idiom. It means he thought it was very easy.
Season
to fall down/trip
To take a trip, like a vacation. To fall or stumble.