sentences:
1.Insects would make it impossible for us to live in the world;they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals
(devour eat immoderately or greedily)
(flock a group of sheep or goats)
(herd a goup of domestic manmmals)
2.Spiders would never do the least harm to us or our belongings.
3.make a census of spiders in grass field in the south of England
(a periodic count of the population)
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