单项选择题

Which of the following is the most suitable title for the passage

A．The Evolution of Insects
B．Environment and Heredity
C．Education: The Influence of the Environment
D．The Instincts of Animals
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单项选择题
Based on the example provided in the passage, we can tell that when a spider is removed to a new position where half of a net has been made, it will probably.
A．begin a completely new net
B．destroy the half-made net
C．spin the rest of the net
D．stay away from the net
单项选择题
Which of the following is true about habits according to the passage
A．They are natural endowments to living creatures.
B．They are more important than instincts to all animals.
C．They are subject to the formative influence of the environment.
D．They are destined to open out a much more far-reaching possibility in the evolution of human beings.
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