A．Insects are the most adaptable creatures.B．Insects would be out of control if nothing were done about the current situation.C．Insects will someday devour all plants on the Earth.D．Insects have developed resistance to both botanical and artificial poisons rapidly.
A．Insects are the most adaptable creatures.
B．Insects would be out of control if nothing were done about the current situation.
C．Insects will someday devour all plants on the Earth.
D．Insects have developed resistance to both botanical and artificial poisons rapidly.