A.open their mouths | B.take sand baths |
C.beat their wings | D.clean each other |
A.fish need cleaning |
B.some fish are cleaner fish |
C.some parasites live in the fish's mouths |
D.larger fish open their mouths to eat cleaner fish |
A.weather report | B.school report |
C.science book | D.history book |
A.Animals Keeping Clean |
B.Different Animals |
C.Driving Away Parasites |
D.Monkeys Living in Groups |