单项选择题

Most animals move from one place to another at a certain time to ______.

A．give birth
B．enjoy warmer weather
C．find food more easily
D．find beautiful places
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单项选择题
The lobsters move ______.
A．w the fresh water
B．to the sea floor
C．at a certain time
D．to find more food
单项选择题
In the second paragraph, the underlined words the building most probably refer to ______.
A．an ordinary building
B．an energy-saving building
C．a green-colored building
D．a water-reducing building
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