24. Of what use are worms?
25. Can you tell me about seaside worms?
26. What kinds of houses do tube-worms make?
27. Can earth-worms feel?
28. Do they harm crops or grass?
29. Is there any worm which has teeth?
III. THE FLY.
1. How many wings has a fly?
2. What has a fly instead of the second pair of wings?
3. Tell me about a fly’s eyes.