good，sing，though，interest，should，both，difference，tell，laugh，athletic |
（86）Jack is very funny. He often ______ jokes.
（87）I enjoy ______.I want to be a singer when I grow up.
（88）Peter went to school ______ he didn't feel well today.
（89）Bill Is more ______ than the other boys in his class. He exercises every day.
（90）______ Tina and Tara are outgoing. They have lots of friends.
（91）My brother is______ at math. He often helps me with my math.
（92）I think this is an interesting book. Bob is ______ in it，too.
（93）I'm ______ from my brother. He's quieter than me.
（94）Where do you think we ______ go now?
（95）It's not polite to ______ at others when they make mistakes.