Who is the (cool) teacher you have?
coolest
Who's the (impatient) person you know?
most impatient
What's the (expensive) thing you've ever bought?
most expensive
Who's the (generous) person in your family?
most generous
What is the(dirty) place you've ever been to?
dirtiest
What's the (exciting) sport you've ever done?
most exciting
What's the (frightening) film you've ever seen?
most frightening
What is the (good) teacher you've had?
best
What's the (beautiful) city you've ever been to?
most beautiful