Math is _______. It is hard to understand.
good
different
easy
difficult
What is your favorite subject?
history
Which subject does Lucy like the most?
art
math
science
music
Try to solve a lot of _______s.
puzzle
plan
problem
trouble
When is your _____ exam?
science
Korean
math
English
Sam has four ____s this week.
exam
I like music, and he likes ____.
P.E.
art
English
history
