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