1. My dad is    the funniest       dad in the world.(funny)

 2. whales are    the heaviest         animals in the world.(heavy)

 3. mice are   the cutest        animal in the world.(cute)  

 4. My bedroom is  the most comfortable    room in my house.(comfortable)

 5. I am   the worst      cook in the world.(bad)

 6. For English people,Japanese is   the most difficult      language to learn.(difficult)

 7. That was   the saddest   film I’ve seen.(sad)

 8. My sister is   the tidiest     person I know.(tidy)

 9. My grandmother is   the oldest   person in my family.(old)

10. That was       the strangest    book I’ve ever read.(strange)