单项选择题

The author's main purpose in writing this passage is to ___________.

A．interpret the function of forgetting
B．illustrate the process of adapting
C．explain the performance of memory
D．emphasize the importance of learning

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热门试题

单项选择题

According to the passage, if a person never forgot, _____________.

A．he would survive best
B．he would have a lot of trouble
C．his ability to learn would be enhanced
D．the evolution of memory would stop

单项选择题

The tone of the passage can best be described as __________________.

A．hypothetical
B．humorous
C．exaggerative
D．philosophical