单项选择题

Why does the author mention a dog's bark

A．It is a type of memory.
B．It is a type of interruption.
C．Dogs have better memories than humans.
D．A dog's bark is similar to a doorbell.
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单项选择题
The author believes that rote rehearsal is ______.
A．the best way to remember something
B．more efficient than chunking
C．ineffective in the long run
D．an unnecessary interruption
单项选择题
The underlined word elapses in paragraph 1 is closest in meaning to ______.
A．passes
B．adds up
C．appears
D．continues
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