单项选择题

A．By the work of biologists.
B．In the process of evolution.
C．Over millions of years.
D．Both A and B
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单项选择题
A．They design the dresses themselves.B．They alter the dresses they have.C．They buy inexpensive clothes.D．They don’t mind the fashion in clothes.
A．They design the dresses themselves.
B．They alter the dresses they have.
C．They buy inexpensive clothes.
D．They don’t mind the fashion in clothes.
单项选择题
A．They changed color more quickly.B．They did not change color.C．They changed color on the same schedule.D．They changed color more slowly.
A．They changed color more quickly.
B．They did not change color.
C．They changed color on the same schedule.
D．They changed color more slowly.
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