13.請依下文回答第 43 題至第 46 題
You forgot where the car was parked at the airport yesterday. The name of that old boyfriend or girlfriend
is 43 your tongue—but what is it? Your memory is terrible. Or so you think. But common sense tells us that
forgetfulness is vital to a healthy brain by clearing our minds of decaying memories.
Today, a small band of scientists are trying to discover how and why the brain chooses to erase certain memories.
Their aim isn’t to increase our ability to remember, 44 are they researching some kind of evil memory-erasing pill.
What interest them is the prospect of helping people get rid of the unwanted memories that, researchers are discovering,
can 45 mental illnesses such as depression and mental disorder caused by an unpleasant experience.
If you can’t remember what you had for breakfast, it’s probably because your brain never bothered to encode the
information. Also evidence suggests that the brain naturally suppresses unwanted memories. In at least some cases,
forgetting is not a passive process of decay, 46 an active process of governing and controlling.
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