单项选择题


A．to take
B．to be taken
C．being taken
D．taking
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单项选择题
From the evolutionary point of view, ______.
A．the gradual process of forgetting is an indication of an individual's adaptability
B．if a person gets very forgetful of a sudden he must be very adaptive
C．forgetting for lack of practice tends to be obviously in adaptive
D．sudden forgetting may bring about adaptive consequences
单项选择题
According to the text, if a person never forgot ______.
A．his ability to learn would be improved
B．he would have a lot of trouble
C．he would survive best
D．the evolution of memory would stop
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